/* ── AIS 2026 — Design System ── */

:root {
  --primary:     #0A1628;
  --primary-hover: #0f1f38;
  --accent:      #F5A623;
  --accent-hover: #e6991a;
  --success:     #10B981;
  --success-hover: #059669;
  --danger:      #EF4444;
  --danger-hover: #DC2626;
  --warning:     #F59E0B;
  --info:        #3B82F6;

  --background:  #F8FAFC;
  --surface:     #FFFFFF;
  --surface-2:   #F1F5F9;
  --text:        #0F172A;
  --text-secondary: #334155;
  --muted:       #64748B;
  --faint:       #94A3B8;
  --border:      #E2E8F0;
  --border-strong: #CBD5E1;
  --ring:        rgba(245, 166, 35, .35);

  --primary-rgb: 10, 22, 40;
  --shadow-sm:   0 1px 2px rgba(0,0,0,.05);
  --shadow-md:   0 4px 12px rgba(0,0,0,.07);
  --shadow-lg:   0 8px 30px rgba(0,0,0,.1);
  --shadow-xl:   0 20px 60px rgba(0,0,0,.12);
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   14px;
  --radius-xl:   20px;
  --radius-full: 9999px;
  --transition:  150ms cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"] {
  --background:  #0B1120;
  --surface:     #151D2E;
  --surface-2:   #1C2640;
  --text:        #F1F5F9;
  --text-secondary: #CBD5E1;
  --muted:       #94A3B8;
  --faint:       #64748B;
  --border:      #1E2D45;
  --border-strong: #2D3F5E;
  --ring:        rgba(245, 166, 35, .25);
  --shadow-sm:   0 1px 2px rgba(0,0,0,.2);
  --shadow-md:   0 4px 12px rgba(0,0,0,.3);
  --shadow-lg:   0 8px 30px rgba(0,0,0,.35);
  --shadow-xl:   0 20px 60px rgba(0,0,0,.4);
  --primary-hover: #1a2d50;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; display: block; }

::selection { background: rgba(245, 166, 35, .2); color: var(--text); }

/* ── Focus ring (accessibility) ── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Containers ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.page { padding: 32px 0; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
  font-family: inherit;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: scale(.98) translateY(0); }
.btn:disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }

.btn-primary {
  background: var(--primary);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--primary-hover); box-shadow: var(--shadow-md); }

.btn-accent {
  background: var(--accent);
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(245, 166, 35, .3);
}
.btn-accent:hover { background: var(--accent-hover); box-shadow: 0 4px 16px rgba(245, 166, 35, .35); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border-strong);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(245, 166, 35, .04); }

.btn-danger  { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: var(--success-hover); }

.btn-ghost   { background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--text); background: var(--surface-2); }

.btn-sm      { padding: 6px 14px; font-size: 13px; border-radius: var(--radius-sm); }
.btn-lg      { padding: 14px 32px; font-size: 16px; border-radius: var(--radius-lg); }
.btn-full    { width: 100%; }

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); }

/* ── Nav ── */
.nav {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(226,232,240,.5);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow .3s, background .3s;
}

[data-theme="dark"] .nav {
  background: rgba(11,17,32,.92);
  border-bottom-color: rgba(30,45,69,.5);
}

.nav-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -.01em;
}
.nav-brand:hover { opacity: .9; }
[data-theme="dark"] .nav-brand { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: var(--surface-2);
}
[data-theme="dark"] .nav-link { color: rgba(255,255,255,.7); }
[data-theme="dark"] .nav-link:hover, [data-theme="dark"] .nav-link.active {
  color: #fff;
  background: rgba(255,255,255,.1);
}

.nav .btn-outline {
  color: var(--text);
  border-color: var(--border-strong);
}
.nav .btn-outline:hover {
  color: var(--accent);
  border-color: var(--accent);
}
[data-theme="dark"] .nav .btn-outline {
  color: rgba(255,255,255,.85);
  border-color: rgba(255,255,255,.2);
}
[data-theme="dark"] .nav .btn-outline:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.nav .btn-ghost { color: var(--muted); }
[data-theme="dark"] .nav .btn-ghost { color: rgba(255,255,255,.6); }
[data-theme="dark"] .nav .btn-ghost:hover { color: #fff; background: rgba(255,255,255,.1); }

.nav .btn-accent { color: #fff; }

/* ── Forms ── */
.form-group { margin-bottom: 18px; }

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  letter-spacing: .01em;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  line-height: 1.5;
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--faint); }

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--ring);
}

[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-textarea {
  background: var(--surface-2);
  border-color: var(--border-strong);
}

.form-input.error, .form-select.error { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(239,68,68,.15); }
.form-error { font-size: 12px; color: var(--danger); margin-top: 4px; font-weight: 500; }
.form-hint  { font-size: 12px; color: var(--muted); margin-top: 4px; }
.form-textarea { resize: vertical; min-height: 90px; }

/* ── Tabs ── */
.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.tabs::-webkit-scrollbar { display: none; }

.tab-btn {
  padding: 12px 20px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  font-family: inherit;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}
.tab-btn:hover { color: var(--text); background: var(--surface-2); }
.tab-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
  font-weight: 600;
}
[data-theme="dark"] .tab-btn.active { color: var(--accent); }

.tab-panel { display: none; padding-top: 24px; }
.tab-panel.active { display: block; animation: fadeIn .2s ease; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .01em;
}
.badge-pending { background: #FFF7ED; color: #C2410C; border: 1px solid #FDBA74; }
.badge-live    { background: #DCFCE7; color: #166534; border: 1px solid #86EFAC; }
.badge-draft   { background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }

[data-theme="dark"] .badge-pending { background: rgba(251,146,60,.12); border-color: rgba(251,146,60,.25); }
[data-theme="dark"] .badge-live    { background: rgba(16,185,129,.12); color: #34D399; border-color: rgba(16,185,129,.25); }

/* ── Loading skeleton ── */
.skeleton {
  background: linear-gradient(90deg, var(--border) 25%, var(--surface-2) 50%, var(--border) 75%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-md);
}
@keyframes shimmer { to { background-position: -400% 0; } }

/* ── Participant card ── */
.participant-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all var(--transition);
  cursor: pointer;
}
.participant-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.participant-card__photo {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.participant-card__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}
.participant-card__sub {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
}
.participant-card__city {
  font-size: 12px;
  color: var(--faint);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ── Stats cards ── */
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.stat-card__number {
  font-size: 36px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -.02em;
  line-height: 1;
}
[data-theme="dark"] .stat-card__number { color: var(--accent); }

.stat-card__label {
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
  font-weight: 500;
}

/* ── Mobile bottom bar ── */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0));
  gap: 8px;
  box-shadow: 0 -4px 16px rgba(0,0,0,.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
[data-theme="dark"] .mobile-bottom-bar { background: rgba(21,29,46,.92); }

/* ── Alert ── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  margin-bottom: 16px;
  line-height: 1.5;
}
.alert-error   { background: #FEF2F2; color: #991B1B; border: 1px solid #FECACA; }
.alert-success { background: #F0FDF4; color: #166534; border: 1px solid #BBF7D0; }
.alert-info    { background: #EFF6FF; color: #1E40AF; border: 1px solid #BFDBFE; }
.alert-warning { background: #FFFBEB; color: #92400E; border: 1px solid #FDE68A; }

[data-theme="dark"] .alert-error   { background: rgba(239,68,68,.1);  border-color: rgba(239,68,68,.2);  color: #FCA5A5; }
[data-theme="dark"] .alert-success { background: rgba(16,185,129,.1); border-color: rgba(16,185,129,.2); color: #6EE7B7; }
[data-theme="dark"] .alert-info    { background: rgba(59,130,246,.1); border-color: rgba(59,130,246,.2); color: #93C5FD; }
[data-theme="dark"] .alert-warning { background: rgba(245,158,11,.1); border-color: rgba(245,158,11,.2); color: #FCD34D; }

/* ── Divider ── */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
  margin: 16px 0;
  font-weight: 500;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Toggle ── */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.toggle input { display: none; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border-strong);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background .2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  top: 3px;
  left: 3px;
  transition: transform .2s;
  box-shadow: 0 1px 3px rgba(0,0,0,.15);
}
.toggle input:checked + .toggle-slider { background: var(--success); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* ── Photo upload ── */
.photo-drop-zone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
}
.photo-drop-zone:hover, .photo-drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(245,166,35,.04);
  box-shadow: 0 0 0 4px var(--ring);
}
.photo-drop-zone input[type="file"] { display: none; }

/* ── Progress bar ── */
.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  background: var(--accent);
  border-radius: var(--radius-full);
  transition: width .4s ease;
}

/* ── Spinner ── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255,255,255,.25);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fadeIn .15s ease;
}
.modal {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 28px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { opacity: 0; transform: scale(.96) translateY(8px); } to { opacity: 1; transform: none; } }

/* ── PWA banner ── */
/* ── Responsive ── */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
}
@media (max-width: 768px) {
  .nav-links .hide-mobile { display: none; }
  .mobile-bottom-bar { display: flex; }
  .page { padding: 20px 0 90px; }
  .container { padding: 0 16px; }
  .nav { padding: 0 16px; }

  .filter-panel--mobile-collapse { display: none; }
  .filter-panel--mobile-collapse.open { display: block; }
}
@media (max-width: 480px) {
  .container { padding: 0 14px; }
  .btn-lg { padding: 12px 24px; font-size: 15px; }
  .card { padding: 16px; border-radius: var(--radius-md); }
  .modal { padding: 20px; border-radius: var(--radius-lg); margin: 8px; }
  .tab-btn { padding: 10px 14px; font-size: 13px; }
}

/* ── Print badge ── */
@media print {
  nav, footer, .btn, .tabs, .mobile-bottom-bar { display: none !important; }
  .print-badge { display: block !important; }
}

/* ── Utilities ── */
.text-gradient {
  background: linear-gradient(135deg, var(--accent) 0%, #FFD700 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}