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

/* Design Tokens */
:root {
  color-scheme: dark;
  /* Colors */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-border: rgba(255, 255, 255, 0.08);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;
  --accent-primary-light: #818cf8;
  --accent-secondary: #06b6d4;
  --accent-tertiary: #8b5cf6;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;

  --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6, #06b6d4);
  --gradient-card: linear-gradient(145deg, rgba(99, 102, 241, 0.08), rgba(6, 182, 212, 0.04));
  --gradient-border: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(6, 182, 212, 0.15));

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  background: var(--bg-primary);
}

body {
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background grid pattern */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 25% 25%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(6, 182, 212, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* Layout */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

/* Header */
.app-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  padding: var(--space-3xl) var(--space-xl);
  position: relative;
}

.app-header::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.header-icon {
  font-size: 3.5rem;
  margin-bottom: var(--space-md);
  display: block;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

.app-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.app-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
}

.toolbar-left {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
  flex: 1;
  min-width: 0;
}

.toolbar-right {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

/* Search */
.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 220px;
  max-width: 400px;
}

.search-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.6rem 0.8rem 0.6rem 2.4rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition-base);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* Sort / Filter selects */
.select-wrapper {
  position: relative;
}

.toolbar-select {
  padding: 0.6rem 2rem 0.6rem 0.8rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  color-scheme: dark;
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  cursor: pointer;
  appearance: none;
  transition: var(--transition-base);
}

.toolbar-select option,
.toolbar-select optgroup {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.toolbar-select option:checked {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.toolbar-select:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.select-wrapper::after {
  content: '▾';
  position: absolute;
  right: 0.7rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.75rem;
  pointer-events: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.6rem 1rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-primary-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  border: 1px solid var(--bg-glass-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-icon {
  font-size: 1rem;
}

/* Google Calendar */
.calendar-section {
  margin-bottom: var(--space-xl);
}

.calendar-header {
  margin-bottom: var(--space-md);
}

.calendar-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.calendar-frame-shell {
  overflow: hidden;
  background: #ffffff;
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.google-calendar-frame {
  display: block;
  width: 100%;
  min-height: 440px;
  height: min(72vh, 620px);
  border: 0;
  background: #ffffff;
}

/* Stats Bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
}

.stat-card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: var(--shadow-glow);
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Event Cards */
.events-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.event-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.4s ease-out forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.event-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition-base);
}

.event-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateX(4px);
}

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

.event-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.event-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

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

.event-title a:hover {
  color: var(--accent-primary-light);
}

.event-source-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.2rem 0.6rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent-primary-light);
  white-space: nowrap;
  flex-shrink: 0;
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.event-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.event-meta-icon {
  font-size: 0.9rem;
  flex-shrink: 0;
}

.event-summary {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.event-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--bg-glass-border);
}

.event-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-primary-light);
  text-decoration: none;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.event-link:hover {
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-primary);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  color: var(--text-muted);
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.empty-text {
  font-size: 0.9rem;
}

/* Loading State */
.loading-state {
  text-align: center;
  padding: var(--space-3xl);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--bg-glass-border);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto var(--space-lg);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loading-text {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Footer */
.app-footer {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  margin-top: var(--space-3xl);
  border-top: 1px solid var(--bg-glass-border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  background: var(--bg-secondary);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  color: var(--text-primary);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  transform: translateY(120%);
  transition: var(--transition-slow);
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
}

.toast-success {
  border-left: 3px solid var(--accent-success);
}

/* Responsive */
@media (max-width: 768px) {
  .app-container {
    padding: var(--space-md);
  }

  .app-header {
    padding: var(--space-xl) var(--space-md);
  }

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

  .toolbar-left,
  .toolbar-right {
    width: 100%;
  }

  .search-wrapper {
    max-width: 100%;
  }

  .toolbar-right {
    justify-content: flex-start;
  }

  .google-calendar-frame {
    min-height: 380px;
    height: 520px;
  }

  .event-header {
    flex-direction: column;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .event-card {
    padding: var(--space-md);
  }

  .event-actions {
    flex-direction: column;
  }
}