/* ============================================
   Coffee Chat Matcher — Shared Styles
   Responsive, mobile-first, coffee-themed
   ============================================ */

/* --- Custom Properties (Theme) --- */
:root {
  /* Coffee palette */
  --color-espresso: #3e2723;
  --color-dark-roast: #5d4037;
  --color-medium-roast: #795548;
  --color-latte: #d7ccc8;
  --color-cream: #efebe9;
  --color-foam: #faf8f6;
  --color-caramel: #ff8f00;
  --color-caramel-dark: #e65100;

  /* Semantic colors */
  --color-bg: var(--color-foam);
  --color-surface: #ffffff;
  --color-text: var(--color-espresso);
  --color-text-muted: var(--color-medium-roast);
  --color-primary: var(--color-dark-roast);
  --color-primary-hover: var(--color-espresso);
  --color-accent: var(--color-caramel);
  --color-accent-hover: var(--color-caramel-dark);
  --color-border: var(--color-latte);
  --color-error: #c62828;
  --color-error-bg: #ffebee;
  --color-success: #2e7d32;
  --color-success-bg: #e8f5e9;

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Typography */
  --font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;

  /* Borders & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(62, 39, 35, 0.1);
  --shadow-md: 0 4px 12px rgba(62, 39, 35, 0.12);
  --shadow-lg: 0 8px 24px rgba(62, 39, 35, 0.15);

  /* Tap target minimum */
  --tap-min: 44px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-md);
}

.page-header {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
}

.page-header h1 {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.page-header p {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
}

/* --- Card / Panel --- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

/* --- Form Elements --- */
.form-group {
  margin-bottom: var(--space-lg);
}

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

.form-input {
  width: 100%;
  min-height: var(--tap-min);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 143, 0, 0.15);
}

.form-input::placeholder {
  color: var(--color-latte);
}

/* --- Field-level validation error --- */
.field-error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  min-height: 1.2em;
}

/* --- Domain Chips --- */
.domain-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.domain-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--tap-min);
  min-height: var(--tap-min);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  color: var(--color-primary);
  background: var(--color-cream);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  user-select: none;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.domain-chip:hover {
  background: var(--color-latte);
  border-color: var(--color-medium-roast);
}

.domain-chip.selected {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

.domain-chip .chip-emoji {
  margin-right: var(--space-xs);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--tap-min);
  min-height: var(--tap-min);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: var(--font-family);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-accent {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-accent:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* --- Messages (success / error) --- */
.message {
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-md);
  display: none;
}

.message.visible {
  display: block;
}

.message-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.message-error {
  background: var(--color-error-bg);
  color: var(--color-error);
}

/* --- Confirmation Content (post-signup) --- */
.message-success.visible {
  padding: var(--space-xl) var(--space-lg);
}

.confirmation-content {
  text-align: center;
}

.confirmation-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--space-md);
}

.confirmation-title {
  font-size: var(--font-size-2xl);
  color: var(--color-success);
  margin-bottom: var(--space-md);
}

.confirmation-session {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  line-height: 1.5;
}

.confirmation-details {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.confirmation-note {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
}

/* --- Avatar Pictogram --- */
.avatar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.avatar-circle {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 700;
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-sm);
}

.avatar-emojis {
  font-size: var(--font-size-sm);
  text-align: center;
  line-height: 1.4;
}

/* --- Avatar Grid (admin / results) --- */
.avatar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: var(--space-lg);
  justify-items: center;
  padding: var(--space-md) 0;
}

/* --- Match Card (contains pair + shared domains) --- */
.match-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

/* --- Match Pair Row (avatars + coffee icon) --- */
.match-pair-row {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-lg);
}

.match-pair-row .coffee-icon {
  font-size: var(--font-size-2xl);
  margin-top: 16px;
}

.match-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* --- Match Grid (responsive multi-column for match/results pages) --- */
.match-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

/* Wider container for pages that need full-width layouts */
.container-wide {
  max-width: 1400px;
}

/* --- Match Animation --- */
.animation-pool {
  position: relative;
  min-height: 300px;
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.animation-pool .avatar {
  position: absolute;
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animation-pool .avatar.paired {
  position: relative;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.avatar.floating {
  animation: float 3s ease-in-out infinite;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.match-card.reveal {
  animation: fadeInUp 0.6s ease forwards;
}

/* --- Navigation --- */
.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-min);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent-hover);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

/* --- Shared Domains Badge --- */
.shared-domains {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: center;
  margin-top: var(--space-sm);
}

.shared-domain-tag {
  font-size: var(--font-size-sm);
  padding: 2px var(--space-sm);
  background: var(--color-cream);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}

/* --- Loading Spinner --- */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-latte);
  border-top-color: var(--color-accent);
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

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

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-2xl) var(--space-md);
  color: var(--color-text-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

/* --- Event Status --- */
.event-status {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  text-align: center;
}

.event-status p {
  margin-top: var(--space-xs);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.event-status-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.event-status-done .event-status-badge {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.event-status-running .event-status-badge {
  background: #fff3e0;
  color: #e65100;
}

.event-status-new .event-status-badge {
  background: var(--color-cream);
  color: var(--color-text-muted);
}

/* --- History Cards --- */
.history-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  background: var(--color-cream);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.history-card-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.history-card-name {
  font-weight: 600;
  color: var(--color-primary);
}

.history-card-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.history-card-current {
  border-left: 4px solid var(--color-accent);
  background: var(--color-surface);
}

.event-status-badge-done {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-success-bg);
  color: var(--color-success);
  vertical-align: middle;
}

.event-status-badge-running {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: #fff3e0;
  color: #e65100;
  vertical-align: middle;
}

.event-status-badge-archived {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-cream);
  color: var(--color-text-muted);
  vertical-align: middle;
}

/* --- Utility --- */
.text-center {
  text-align: center;
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.hidden {
  display: none !important;
}

/* --- Event Banner --- */
.event-banner {
  background: linear-gradient(135deg, var(--color-espresso), var(--color-dark-roast));
  color: #ffffff;
  text-align: center;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* Context banner shown on match/results pages */
.event-context-banner {
  background: var(--color-primary);
  color: #ffffff;
  text-align: center;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.event-banner-text {
  display: inline-block;
}

.event-banner.hidden {
  display: none !important;
}

/* ============================================
   Responsive — Mobile-first
   Single-column below 600px
   ============================================ */
@media (max-width: 600px) {
  .container {
    padding: var(--space-sm);
  }

  .page-header {
    padding: var(--space-lg) var(--space-sm);
  }

  .page-header h1 {
    font-size: var(--font-size-xl);
  }

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

  /* Stack domain chips in a single column */
  .domain-chips {
    flex-direction: column;
  }

  .domain-chip {
    width: 100%;
    justify-content: flex-start;
  }

  /* Stack match pairs vertically on small screens */
  .match-pair-row {
    flex-direction: column;
    gap: var(--space-md);
  }

  /* Reduce avatar grid to fewer columns */
  .avatar-grid {
    grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
    gap: var(--space-md);
  }

  .avatar-circle {
    width: 52px;
    height: 52px;
    font-size: var(--font-size-base);
  }

  /* Ensure nav links remain tappable */
  .nav-bar {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .event-banner {
    font-size: var(--font-size-base);
    padding: var(--space-sm) var(--space-md);
  }
}

/* Larger screens — wider container */
@media (min-width: 1024px) {
  .container {
    padding: var(--space-lg);
  }

  .avatar-circle {
    width: 72px;
    height: 72px;
    font-size: var(--font-size-xl);
  }
}


/* --- Confirmation modal --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-dialog {
  background: var(--color-surface, #1e1e2e);
  border: 1px solid var(--color-border, #333);
  border-radius: 12px;
  padding: 24px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* --- Nav Event Picker Dropdown --- */
.nav-event-dropdown {
  background: var(--color-surface, #fff);
  border: 1px solid var(--color-border, #e0e0e0);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  z-index: 1000;
  max-height: 320px;
  overflow-y: auto;
}

.nav-event-dropdown-title {
  padding: 8px 12px 4px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted, #888);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-event-dropdown-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  text-decoration: none;
  color: var(--color-text, #333);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s;
}

.nav-event-dropdown-item:hover {
  background: var(--color-bg-hover, #f5f5f5);
}

.nav-event-dropdown-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.nav-event-dropdown-date {
  font-size: 0.75rem;
  color: var(--color-text-muted, #888);
  margin-left: 12px;
  white-space: nowrap;
}

.nav-event-dropdown-loading,
.nav-event-dropdown-empty {
  padding: 12px 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted, #888);
  text-align: center;
}

/* --- Consent Checkbox --- */
.consent-label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text, #333);
  cursor: pointer;
  line-height: 1.4;
}

.consent-label input[type="checkbox"] {
  margin-top: 3px;
  flex-shrink: 0;
}

/* --- Speaker Card --- */
.speaker-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.speaker-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-accent, #c8a97e);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.speaker-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text, #333);
}