/* =============================================
   ASK Digital Academy - ASKデジタルアカデミー
   Global Stylesheet
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+JP:wght@300;400;500;600;700;900&display=swap');

/* --- Design Tokens --- */
:root {
  /* Primary Colors */
  --primary: #2563EB;
  --primary-light: #60A5FA;
  --primary-dark: #1E40AF;
  --primary-50: #EFF6FF;
  --primary-100: #DBEAFE;
  --primary-200: #BFDBFE;
  --primary-900: #1E3A8A;

  /* Accent Colors */
  --accent: #10B981;
  --accent-light: #34D399;
  --accent-dark: #059669;
  --accent-50: #ECFDF5;

  /* Neutral Colors */
  --bg-white: #F8FAFC;
  --bg-gray: #F1F5F9;
  --bg-dark: #0F172A;
  --bg-dark-blue: #1E293B;
  --text-dark: #1E293B;
  --text-mid: #475569;
  --text-light: #94A3B8;
  --border-color: #E2E8F0;
  --white: #FFFFFF;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #2563EB 0%, #10B981 100%);
  --gradient-hero: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
  --gradient-card: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.8) 100%);

  /* Typography */
  --font-ja: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  --font-en: 'Inter', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Borders & Shadows */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.03);
  --shadow-glow-blue: 0 0 20px rgba(37, 99, 235, 0.3);
  --shadow-glow-green: 0 0 20px rgba(16, 185, 129, 0.3);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index layers */
  --z-canvas: -1;
  --z-content: 1;
  --z-header: 100;
  --z-modal: 200;
  --z-fab: 150;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-ja);
  color: var(--text-dark);
  background-color: var(--bg-white);
  line-height: 1.8;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

/* --- Canvas Background --- */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-canvas);
  pointer-events: none;
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section-title {
  font-family: var(--font-en);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--space-3);
}

.section-heading {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-4);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--text-mid);
  line-height: 1.9;
  max-width: 680px;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Fade-in animation on scroll */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  transition: all var(--transition-base);
  padding: var(--space-5) 0;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
  padding: var(--space-3) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-right: var(--space-8);
}

.logo img {
  height: 77px;
  width: auto;
  transition: height var(--transition-base);
}

.site-header.scrolled .logo img {
  height: 53px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-links a {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-mid);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--gradient-primary);
  color: var(--white) !important;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-xs);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-blue);
}

.nav-cta::after {
  display: none !important;
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: 300;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: var(--space-20) 0 var(--space-16);
  background: var(--gradient-hero);
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
}

.hero h1 {
  font-size: var(--font-size-5xl);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.8s ease-out 0.1s both;
}

.hero-description {
  font-size: var(--font-size-xl);
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: var(--space-10);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  background: var(--gradient-primary);
  color: var(--white);
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.button-icon {
  width: 1.15em;
  height: 1.15em;
  flex: 0 0 auto;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-blue);
}

.is-disabled {
  cursor: not-allowed;
  opacity: 0.6;
  filter: grayscale(1);
}

.btn-primary.is-disabled,
.btn-primary.is-disabled:hover,
.summer-btn.is-disabled,
.summer-btn.is-disabled:hover {
  background: var(--text-light) !important;
  box-shadow: none !important;
  transform: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  background: var(--white);
  color: var(--text-dark);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  animation: bounce 2s infinite;
}

.scroll-indicator span {
  font-size: var(--font-size-xs);
  color: var(--text-light);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-en);
}

.scroll-indicator .arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-light);
  border-bottom: 2px solid var(--text-light);
  transform: rotate(45deg);
}

/* --- Section Base --- */
.section {
  padding: var(--space-24) 0;
  position: relative;
}

/* --- Junior Section --- */
.section-junior {
  background: linear-gradient(180deg, rgba(239, 246, 255, 0.7) 0%, rgba(219, 234, 254, 0.3) 100%);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.course-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

.course-card:hover::before {
  opacity: 1;
}

.course-icon {
  width: 88px;
  height: 88px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.course-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.course-icon.blue { background: var(--primary-50); }
.course-icon.green { background: var(--accent-50); }

.course-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.course-card p {
  color: var(--text-mid);
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

/* Pricing Table */
.pricing-table {
  margin-top: var(--space-12);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.pricing-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition-base);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow-blue);
  transform: scale(1.03);
}

.pricing-card.featured::before {
  content: 'おすすめ';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-4px);
}

.pricing-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.pricing-schedule {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  margin-bottom: var(--space-4);
}

.pricing-amount {
  font-family: var(--font-en);
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}

.pricing-amount small {
  font-size: var(--font-size-base);
  font-weight: 400;
  color: var(--text-light);
}

.pricing-features {
  margin-top: var(--space-6);
  text-align: left;
}

.pricing-features li {
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
  color: var(--text-mid);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.pricing-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
}

/* --- Payment Section --- */
.section-payment {
  background: var(--white);
}

.payment-flow {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

.payment-step {
  width: 160px;
  box-sizing: border-box;
  text-align: center;
  padding: var(--space-6);
  background: var(--bg-gray);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.payment-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.payment-step .step-number {
  font-family: var(--font-en);
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}

.payment-step .step-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  margin-left: auto;
  margin-right: auto;
}

.payment-step .step-icon img {
  width: 32px;
  height: 32px;
}

.payment-step .step-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.payment-arrow {
  width: 40px;
  text-align: center;
  font-size: 1.5rem;
  color: var(--text-light);
}

.payment-methods {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-top: var(--space-10);
}

.payment-method {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  font-weight: 600;
}

.payment-flows-wrapper {
  width: 100%; /* Added: Wrapper takes full width */
  display: flex;
  flex-direction: column;
  gap: var(--space-10); /* Changed: Consistent vertical spacing between rows */
  align-items: center;
  /* Removed: margin-top: var(--space-12); */
}

/* --- Map Section --- */
.section-access {
  background: var(--bg-gray);
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-dark-blue);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
}

.footer-column h4 {
  color: var(--white);
  font-size: var(--font-size-sm);
  font-weight: 700;
  margin-bottom: var(--space-5);
  letter-spacing: 0.05em;
}

.footer-column a {
  display: block;
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--white);
}

.footer-column a.is-disabled,
.footer-column a.is-disabled:hover {
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.4);
}

.sponsor {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.4);
}

.social-links {
  display: flex;
  gap: var(--space-4);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-fast);
  font-size: 1.1rem;
}

.social-links a:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

.social-links a.is-disabled,
.social-links a.is-disabled:hover {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.5);
  transform: none;
}

/* --- LINE Fixed Button --- */
.line-btn-fixed {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: var(--z-fab);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: #06C755;
  color: var(--white);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--font-size-sm);
  box-shadow: 0 4px 20px rgba(6, 199, 85, 0.35);
  cursor: pointer;
  transition: all var(--transition-fast);
  animation: pulse-green 2s infinite;
}

.line-btn-fixed:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 6px 30px rgba(6, 199, 85, 0.5);
}

.line-btn-fixed.is-disabled,
.line-btn-fixed.is-disabled:hover {
  display: none;
  background: var(--text-light);
  box-shadow: none;
  transform: none;
  animation: none;
}

.line-btn-fixed .line-icon {
  width: 1.3rem;
  height: 1.3rem;
  flex: 0 0 auto;
}

/* =============================================
   Dashboard Styles
   ============================================ */

/* Login Page */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.login-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  padding: var(--space-12);
  max-width: 440px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  text-align: center;
}

.login-card .logo {
  justify-content: center;
  margin-bottom: var(--space-8);
}

.login-card h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-2);
}

.login-card .subtitle {
  color: var(--text-light);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-5);
  text-align: left;
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--text-mid);
}

.form-group input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-family: var(--font-ja);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.login-btn {
  width: 100%;
  padding: var(--space-4);
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: var(--space-4);
}

.login-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-blue);
}

.login-error {
  color: #EF4444;
  font-size: var(--font-size-sm);
  margin-top: var(--space-3);
  display: none;
}

/* Dashboard Layout */
.dashboard {
  display: none;
  min-height: 100vh;
}

.dashboard.active {
  display: block;
}

.dash-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-header);
}

.dash-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dash-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.dash-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.dash-user-info .user-name {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.dash-user-info .user-role {
  font-size: var(--font-size-xs);
  color: var(--text-light);
}

.dash-logout {
  padding: var(--space-2) var(--space-5);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-mid);
  transition: all var(--transition-fast);
}

.dash-logout:hover {
  border-color: #EF4444;
  color: #EF4444;
}

/* Dashboard Tabs */
.dash-tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--bg-gray);
  padding: var(--space-1);
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
  width: fit-content;
}

.dash-tab {
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-mid);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.dash-tab.active {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.dash-tab:hover:not(.active) {
  color: var(--text-dark);
}

/* Dashboard Content */
.dash-content {
  padding: var(--space-6) 0;
}

.dash-panel {
  display: none;
}

.dash-panel.active {
  display: block;
}

/* Dashboard Cards */
.dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
}

.dash-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.dash-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.dash-card-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.dash-card-header .card-badge {
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.card-badge.blue {
  background: var(--primary-50);
  color: var(--primary);
}

.card-badge.green {
  background: var(--accent-50);
  color: var(--accent-dark);
}

/* Chart Container */
.chart-container {
  position: relative;
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
}

.chart-container canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
  max-width: 100%;
}

/* Calendar */
.calendar {
  width: 100%;
}

.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.calendar-header h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
}

.calendar-nav {
  display: flex;
  gap: var(--space-2);
}

.calendar-nav button {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-size: 0.75rem;
}

.calendar-nav button:hover {
  background: var(--primary-50);
  border-color: var(--primary);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}

.calendar-day-header {
  text-align: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-light);
  padding: var(--space-2);
}

.calendar-day {
  text-align: center;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  position: relative;
  min-height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.calendar-day .day-number {
  font-weight: 500;
}

.calendar-day .availability {
  font-size: var(--font-size-xs);
  font-weight: 700;
}

.availability.open { color: var(--accent); }
.availability.limited { color: #F59E0B; }
.availability.full { color: #EF4444; }

/* Messages */
.message-list {
  max-height: 400px;
  overflow-y: auto;
}

.message-item {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--bg-gray);
  margin-bottom: var(--space-3);
}

.message-item .msg-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.message-item .msg-sender {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--primary);
}

.message-item .msg-date {
  font-size: var(--font-size-xs);
  color: var(--text-light);
}

.message-item .msg-body {
  font-size: var(--font-size-sm);
  color: var(--text-mid);
  line-height: 1.7;
}

/* --- Student Dashboard (Gamification) --- */

/* Level & EXP */
.student-status {
  background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  color: var(--white);
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
}

.student-status::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.status-top {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-bottom: var(--space-5);
}

.level-badge {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow-blue);
}

.level-badge .lv-label {
  font-family: var(--font-en);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.8;
}

.level-badge .lv-number {
  font-family: var(--font-en);
  font-size: var(--font-size-2xl);
  font-weight: 900;
  line-height: 1;
}

.status-info h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.status-info .exp-text {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.exp-bar-container {
  width: 100%;
}

.exp-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-2);
}

.exp-bar {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.exp-bar-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
  position: relative;
}

.exp-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  animation: shimmer 2s infinite;
}

/* Stamp Card */
.stamp-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-bottom: var(--space-6);
}

.stamp-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.stamp-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-3);
}

.stamp-slot {
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  border: 2px dashed var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: all var(--transition-base);
  background: var(--bg-gray);
}

.stamp-slot.earned {
  border-style: solid;
  border-color: var(--accent);
  background: var(--accent-50);
  animation: stampIn 0.3s ease-out;
}

.stamp-slot.gift {
  border-color: #F59E0B;
  background: #FFFBEB;
}

.stamp-progress {
  text-align: center;
  margin-top: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--text-mid);
}

/* Mission List */
.mission-list {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.mission-list h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.mission-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
}

.mission-item:hover {
  background: var(--bg-gray);
}

.mission-checkbox {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.mission-item.completed .mission-checkbox {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
}

.mission-content {
  flex: 1;
}

.mission-content .mission-title {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.mission-item.completed .mission-title {
  text-decoration: line-through;
  color: var(--text-light);
}

.mission-content .mission-exp {
  font-size: var(--font-size-xs);
  color: var(--primary);
  font-weight: 600;
}

.mission-item.completed .mission-exp {
  color: var(--text-light);
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes pulse-green {
  0% { box-shadow: 0 4px 20px rgba(6, 199, 85, 0.35); }
  50% { box-shadow: 0 4px 30px rgba(6, 199, 85, 0.55); }
  100% { box-shadow: 0 4px 20px rgba(6, 199, 85, 0.35); }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes stampIn {
  0% { transform: scale(0); }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

@keyframes levelUp {
  0% { transform: scale(1); box-shadow: var(--shadow-glow-blue); }
  50% { transform: scale(1.15); box-shadow: 0 0 40px rgba(37, 99, 235, 0.6); }
  100% { transform: scale(1); box-shadow: var(--shadow-glow-blue); }
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .hero h1 {
    font-size: var(--font-size-4xl);
  }

}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    z-index: 250;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    font-size: var(--font-size-xl);
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding: var(--space-20) 0 var(--space-12);
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn-primary,
  .hero-buttons .btn-secondary {
    justify-content: center;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }

  .payment-flow {
    flex-direction: column;
  }

  .payment-arrow {
    transform: rotate(90deg);
  }

  .payment-methods {
    flex-direction: column;
    align-items: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .dash-grid {
    grid-template-columns: 1fr;
  }

  .chart-container {
    max-width: 100%;
  }

  .stamp-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-2);
  }

  .line-btn-fixed {
    bottom: var(--space-4);
    right: var(--space-4);
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-xs);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }

  .chart-container {
    width: min(100%, 320px);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .course-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .status-top {
    flex-direction: column;
    text-align: center;
  }

  .auth-gate-demo-accounts {
    grid-template-columns: repeat(2, 1fr);
  }

  .auth-gate-demo-btn {
    padding: var(--space-2);
  }

  .demo-role-label {
    font-size: var(--font-size-xs);
  }
}

/* =============================================
   Summer Course Section
   ============================================ */
.section-summer {
  background: linear-gradient(135deg, #FFF7ED 0%, #FFFBEB 30%, #FEF3C7 100%);
  position: relative;
  overflow: hidden;
}

.section-summer::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(251, 146, 60, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.section-summer::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(234, 179, 8, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.summer-label {
  color: #EA580C !important;
}

.summer-badge-container {
  margin-bottom: var(--space-4);
}

.summer-limited-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: linear-gradient(135deg, #FB923C, #F59E0B);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3);
  animation: pulse-orange 2s infinite;
}

.text-gradient-summer {
  background: linear-gradient(135deg, #EA580C 0%, #D97706 50%, #CA8A04 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.summer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-10);
}

.summer-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  position: relative;
}

.summer-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(249, 115, 22, 0.15);
}

.summer-card-accent {
  height: 6px;
  width: 100%;
}

.summer-accent-orange {
  background: linear-gradient(90deg, #FB923C, #F59E0B);
}

.summer-accent-teal {
  background: linear-gradient(90deg, #14B8A6, #06B6D4);
}

.summer-card-content {
  padding: var(--space-8);
}

.summer-card-icon {
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.summer-card-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.summer-card-label {
  font-family: var(--font-en);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #EA580C;
  margin-bottom: var(--space-2);
}

.summer-card h3 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
  color: var(--text-dark);
}

.summer-card-desc {
  font-size: var(--font-size-base);
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.summer-features {
  list-style: none;
  margin-bottom: var(--space-6);
}

.summer-features li {
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
  color: var(--text-mid);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.summer-features li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: #FB923C;
  flex: 0 0 auto;
}

.summer-features li.summer-feature-with-icon::before {
  content: none;
}

.summer-feature-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
  flex: 0 0 auto;
}

.summer-pricing {
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-color);
}

.summer-period {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  margin-bottom: var(--space-2);
}

.summer-price {
  font-family: var(--font-en);
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: #EA580C;
  line-height: 1.1;
}

.summer-price small {
  font-size: var(--font-size-base);
  font-weight: 400;
  color: var(--text-light);
}

.summer-cta {
  margin-top: var(--space-12);
  padding: var(--space-8);
  background: rgba(249, 115, 22, 0.08);
  border-radius: var(--radius-xl);
  border-left: 4px solid #FB923C;
  text-align: center;
}

.summer-cta p {
  font-size: var(--font-size-lg);
  color: #92400E;
  margin-bottom: var(--space-6);
}

.summer-btn {
  background: linear-gradient(135deg, #FB923C, #F59E0B) !important;
  box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3) !important;
}

.summer-btn:hover {
  box-shadow: 0 6px 25px rgba(249, 115, 22, 0.5) !important;
}

@keyframes pulse-orange {
  0% { box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3); }
  50% { box-shadow: 0 4px 25px rgba(249, 115, 22, 0.5); }
  100% { box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3); }
}

/* =============================================
   Instructor Dashboard
   ============================================ */
.instructor-header {
  background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
  color: var(--white);
  margin-bottom: var(--space-6);
}

.instructor-info {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.instructor-avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #F59E0B, #FB923C);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.instructor-info h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.instructor-meta {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.instructor-sections {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.instructor-card {
  border: 1px solid var(--border-color);
}

.instructor-card-desc {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  margin-bottom: var(--space-5);
}

/* Schedule Manager */
.schedule-manager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.schedule-calendar {
  /* uses existing calendar styles */
}

.schedule-legend {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--text-light);
}

.calendar-day.sched-clickable {
  cursor: pointer;
  transition: all var(--transition-fast);
}

.calendar-day.sched-clickable:hover {
  background: var(--primary-50);
  border-radius: var(--radius-sm);
}

.calendar-day.sched-selected {
  background: var(--primary-100) !important;
  border-radius: var(--radius-sm);
  box-shadow: inset 0 0 0 2px var(--primary);
}

.schedule-edit-panel {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.edit-panel-placeholder {
  text-align: center;
  color: var(--text-light);
}

.edit-placeholder-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.edit-panel-placeholder p {
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.edit-panel-form {
  width: 100%;
}

.edit-panel-form h4 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
  color: var(--primary);
}

.status-selector {
  margin-bottom: var(--space-5);
}

.status-selector label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--text-mid);
}

.status-options {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.status-option {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--border-color);
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: var(--white);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.status-option:hover {
  border-color: var(--primary-light);
}

.status-option.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.status-option[data-status="limited"].active {
  background: #F59E0B;
  border-color: #F59E0B;
}

.status-option[data-status="full"].active {
  background: #EF4444;
  border-color: #EF4444;
}

.btn-save-schedule {
  width: 100%;
  padding: var(--space-3) var(--space-6);
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: var(--space-4);
}

.btn-save-schedule:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-blue);
}

/* Message Form */
.message-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.message-form select,
.message-form textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-family: var(--font-ja);
  transition: border-color var(--transition-fast);
  outline: none;
  background: var(--white);
}

.message-form select:focus,
.message-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.message-form textarea {
  resize: vertical;
  min-height: 120px;
}

.msg-templates {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.msg-template-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-color);
  font-size: var(--font-size-xs);
  font-weight: 600;
  background: var(--white);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.msg-template-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-50);
}

.btn-send-message {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-4);
  background: linear-gradient(135deg, #059669, #10B981);
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-send-message:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-green);
}

/* Sent Messages */
.sent-message-list {
  max-height: 400px;
  overflow-y: auto;
}

.sent-message-item {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--bg-gray);
  margin-bottom: var(--space-3);
  transition: all var(--transition-fast);
}

.sent-message-item:hover {
  background: var(--primary-50);
}

/* Toast Notification */
.toast-notification {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(30, 41, 59, 0.95);
  color: white;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-sm);
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.toast-notification.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* =============================================
   Share Section
   ============================================ */
.share-section {
  background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
  padding: var(--space-10) 0;
}

.share-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.share-text h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-2);
}

.share-text p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.share-buttons {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  color: white;
}

.share-btn:hover {
  transform: translateY(-2px);
}

.share-btn:disabled,
.share-btn.is-disabled,
.share-btn.is-disabled:hover {
  cursor: not-allowed;
  opacity: 0.62;
  box-shadow: none;
  transform: none;
}

.share-line {
  background: #06C755;
}

.share-line:hover {
  box-shadow: 0 4px 15px rgba(6, 199, 85, 0.4);
}

.share-x {
  background: #000000;
}

.share-x:hover {
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.share-facebook {
  background: #1877F2;
}

.share-facebook:hover {
  box-shadow: 0 4px 15px rgba(24, 119, 242, 0.4);
}

.share-copy {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.share-copy:hover {
  background: rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1);
}

/* Share Toast */
.share-toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(16, 185, 129, 0.95);
  color: white;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-sm);
  font-weight: 700;
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.share-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* =============================================
   Summer & Instructor Responsive
   ============================================ */
@media (max-width: 768px) {
  .summer-grid {
    grid-template-columns: 1fr;
  }

  .schedule-manager {
    grid-template-columns: 1fr;
  }

  .share-inner {
    flex-direction: column;
    text-align: center;
  }

  .share-buttons {
    justify-content: center;
  }

  .instructor-info {
    flex-direction: column;
    text-align: center;
  }

  .msg-templates {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .summer-grid {
    grid-template-columns: 1fr;
  }

  .status-options {
    flex-direction: column;
  }

  .share-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .share-btn {
    justify-content: center;
  }
}

/* =============================================
   Admin Dashboard
   ============================================ */

/* Layout */
.admin-dashboard {
  display: none;
  min-height: 100vh;
}

.admin-dashboard[style*="flex"] {
  display: flex;
}

/* Sidebar */
.admin-sidebar {
  width: 260px;
  background: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);
  color: var(--white);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 200;
  transition: transform var(--transition-base);
}

.sidebar-header {
  padding: var(--space-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sidebar-header .logo img {
  height: 32px;
}

.sidebar-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  background: linear-gradient(135deg, #8B5CF6, #A78BFA);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-ja);
}

.sidebar-link:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
}

.sidebar-link.active {
  color: var(--white);
  background: rgba(139, 92, 246, 0.2);
  font-weight: 600;
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  width: 3px;
  height: 24px;
  background: #8B5CF6;
  border-radius: 0 4px 4px 0;
}

.sidebar-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: var(--space-4) var(--space-3);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-logout {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  width: 100%;
  border-radius: var(--radius-lg);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-ja);
}

.sidebar-logout:hover {
  color: #EF4444;
  background: rgba(239, 68, 68, 0.1);
}

/* Main Content */
.admin-main {
  flex: 1;
  margin-left: 260px;
  padding: var(--space-8);
  min-height: 100vh;
  background: var(--bg-gray);
}

.admin-section {
  display: none;
}

.admin-section.active {
  display: block;
  animation: adminFadeIn 0.4s ease-out;
}

@keyframes adminFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.admin-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.admin-section-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
}

.admin-greeting {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  margin-top: var(--space-1);
}

/* KPI Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.kpi-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.kpi-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.kpi-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}

.kpi-blue::after { background: linear-gradient(90deg, #2563EB, #60A5FA); }
.kpi-green::after { background: linear-gradient(90deg, #10B981, #34D399); }
.kpi-purple::after { background: linear-gradient(90deg, #8B5CF6, #A78BFA); }
.kpi-orange::after { background: linear-gradient(90deg, #F59E0B, #FBBF24); }

.kpi-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.kpi-blue .kpi-icon { background: var(--primary-50); }
.kpi-green .kpi-icon { background: var(--accent-50); }
.kpi-purple .kpi-icon { background: #F5F3FF; }
.kpi-orange .kpi-icon { background: #FFFBEB; }

.kpi-data {
  flex: 1;
}

.kpi-number {
  font-family: var(--font-en);
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-dark);
}

.kpi-label {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  margin-top: var(--space-1);
}

.kpi-trend {
  font-size: var(--font-size-xs);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.kpi-trend.up {
  color: #059669;
  background: #ECFDF5;
}

.kpi-trend.down {
  color: #DC2626;
  background: #FEF2F2;
}

.kpi-trend.neutral {
  color: #6B7280;
  background: #F3F4F6;
}

/* Admin Cards */
.admin-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.admin-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.admin-card-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.admin-grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-6);
}

.chart-container-admin {
  position: relative;
  width: 100%;
  max-height: 300px;
}

/* Activity List */
.activity-list {
  display: flex;
  flex-direction: column;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
}

.activity-item:hover {
  background: var(--bg-gray);
}

.activity-item + .activity-item {
  border-top: 1px solid var(--border-color);
}

.activity-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.activity-blue { background: var(--primary-50); }
.activity-green { background: var(--accent-50); }
.activity-purple { background: #F5F3FF; }
.activity-orange { background: #FFFBEB; }

.activity-content {
  flex: 1;
}

.activity-text {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-dark);
}

.activity-time {
  font-size: var(--font-size-xs);
  color: var(--text-light);
  margin-top: 2px;
}

/* Admin Action Button */
.admin-action-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: linear-gradient(135deg, #8B5CF6, #7C3AED);
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-ja);
}

.admin-action-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
}

.admin-close-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  background: none;
}

.admin-close-btn:hover {
  background: #FEF2F2;
  border-color: #EF4444;
  color: #EF4444;
}

/* Filters */
.admin-filters {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.search-box {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--white);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-4);
  flex: 1;
  min-width: 240px;
  transition: border-color var(--transition-fast);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-icon {
  font-size: 1rem;
  color: var(--text-light);
}

.search-box input {
  border: none;
  outline: none;
  width: 100%;
  font-size: var(--font-size-sm);
  font-family: var(--font-ja);
  background: transparent;
}

.admin-select {
  padding: var(--space-2) var(--space-4);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-family: var(--font-ja);
  background: var(--white);
  color: var(--text-dark);
  cursor: pointer;
  transition: border-color var(--transition-fast);
  outline: none;
}

.admin-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Data Table */
.table-card {
  overflow: hidden;
}

.table-responsive {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.admin-table thead th {
  background: var(--bg-gray);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  color: var(--text-mid);
  font-size: var(--font-size-xs);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
  border-bottom: 2px solid var(--border-color);
}

.admin-table tbody tr {
  transition: background var(--transition-fast);
  border-bottom: 1px solid var(--border-color);
}

.admin-table tbody tr:hover {
  background: rgba(37, 99, 235, 0.02);
}

.admin-table tbody td {
  padding: var(--space-3) var(--space-4);
  color: var(--text-mid);
  white-space: nowrap;
}

.table-footer {
  padding: var(--space-4);
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--text-light);
  border-top: 1px solid var(--border-color);
}

/* Student cell */
.student-cell {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.student-avatar-sm {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.student-name {
  font-weight: 600;
  color: var(--text-dark);
}

.student-email {
  font-size: var(--font-size-xs);
  color: var(--text-light);
}

/* Tags */
.area-tag {
  display: inline-block;
  padding: 2px 10px;
  background: var(--primary-50);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.level-tag {
  font-family: var(--font-en);
  font-weight: 800;
  color: var(--primary);
  font-size: var(--font-size-xs);
}

.att-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
}

.att-green { background: #ECFDF5; color: #059669; }
.att-orange { background: #FFFBEB; color: #D97706; }
.att-red { background: #FEF2F2; color: #DC2626; }

.exp-reward {
  font-family: var(--font-en);
  font-weight: 700;
  color: var(--primary);
  font-size: var(--font-size-xs);
}

.status-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.status-active { background: #ECFDF5; color: #059669; }
.status-draft { background: #FFFBEB; color: #D97706; }
.status-completed { background: var(--primary-50); color: var(--primary); }

/* Table Actions */
.table-actions {
  display: flex;
  gap: var(--space-2);
}

.action-btn {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid var(--border-color);
  background: var(--white);
  font-size: 0.85rem;
}

.action-btn:hover {
  transform: translateY(-1px);
}

.action-delete:hover {
  background: #FEF2F2;
  border-color: #EF4444;
}

/* Mission form */
.mission-form-card {
  margin-bottom: var(--space-5);
  border: 2px solid rgba(139, 92, 246, 0.2);
}

.admin-form-row {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
}

.admin-form-row .form-group {
  flex: 1;
}

/* Mobile Admin Header */
.admin-mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 190;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
}

.admin-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
  border: none;
  background: none;
}

.admin-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.admin-mobile-logout {
  font-size: 1.2rem;
  border: none;
  background: none;
  cursor: pointer;
}

/* Sidebar overlay (mobile) */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 195;
}

.sidebar-overlay.active {
  display: block;
}

/* =============================================
   Admin Responsive
   ============================================ */
@media (max-width: 1024px) {
  .admin-grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .admin-sidebar {
    transform: translateX(-100%);
  }

  .admin-sidebar.open {
    transform: translateX(0);
  }

  .admin-mobile-header {
    display: flex;
  }

  .admin-main {
    margin-left: 0;
    padding: var(--space-4);
    padding-top: calc(56px + var(--space-4));
  }

  .kpi-grid {
    grid-template-columns: 1fr 1fr;
  }

  .admin-section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .admin-filters {
    flex-direction: column;
  }

  .search-box {
    min-width: 100%;
  }

  .admin-form-row {
    flex-direction: column;
    gap: 0;
  }

  .admin-grid-2 {
    grid-template-columns: 1fr;
  }

  .admin-table {
    font-size: var(--font-size-xs);
  }

  .admin-table thead th,
  .admin-table tbody td {
    padding: var(--space-2) var(--space-3);
  }

  .calendar-nav-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 0.75rem;
    cursor: pointer;
    background: var(--white);
  }
}

@media (max-width: 480px) {
  .kpi-grid {
    grid-template-columns: 1fr;
  }

  .kpi-card {
    padding: var(--space-4);
  }

  .kpi-number {
    font-size: var(--font-size-2xl);
  }

  .admin-main {
    padding: var(--space-3);
    padding-top: calc(56px + var(--space-3));
  }
}

/* =============================================
   Auth Gate - 認証ゲート スタイル
   ============================================ */

/* ロック中はスクロール無効 */
body.auth-gate-locked {
  overflow: hidden;
}

/* オーバーレイ */
.auth-gate-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10000;
  display: none;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 58, 138, 0.88) 50%, rgba(5, 150, 105, 0.85) 100%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-6);
  animation: authGateFadeIn 0.5s ease-out;
}

.auth-gate-overlay.active {
  display: flex;
}

.auth-gate-overlay.fade-out {
  animation: authGateFadeOut 0.5s ease-in forwards;
}

@keyframes authGateFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes authGateFadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* カード */
.auth-gate-card {
  width: 100%;
  max-width: 420px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.2);
  animation: authCardSlideIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.auth-gate-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

@keyframes authCardSlideIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ロゴ */
.auth-gate-logo {
  text-align: center;
  margin-bottom: var(--space-6);
}

.auth-gate-logo img {
  height: 48px;
  width: auto;
  margin: 0 auto;
}

/* タイトル */
.auth-gate-title {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-gate-title h2 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.auth-gate