/* ============================================
   EventFlow — Design System: Midnight Kinetic
   ============================================ */

:root {
  /* Core surfaces */
  --surface: #0a0e1a;
  --surface-dim: #0a0e1a;
  --surface-low: #0e1320;
  --surface-container: #141928;
  --surface-container-high: #1a1f2f;
  --surface-container-highest: #202537;
  --surface-bright: #252b3f;

  /* Primary / accent */
  --primary: #81e9ff;
  --primary-container: #00e0ff;
  --primary-dim: #00d1ee;
  --on-primary: #005561;

  /* Text */
  --on-surface: #e2e4f6;
  --on-surface-variant: #a7aabb;
  --outline: #717584;
  --outline-variant: #444756;

  /* States */
  --error: #ff6e84;
  --warning: #f59e0b;
  --success: #10b981;
  --tertiary: #ffaced;

  /* Typography */
  --font-display: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Layout */
  --header-h: 64px;
  --nav-h: 72px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --radius-card: 16px;
  --radius-full: 9999px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; }
body {
  height: 100%;
  background: var(--surface);
  color: var(--on-surface);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* ---- App shell ---- */
.app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 430px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

/* ---- Header (glassmorphism) ---- */
.app-header {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: var(--header-h);
  z-index: 100;
  background: rgba(10, 14, 26, 0.72);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(68, 71, 86, 0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 20px;
}
.header-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}
.brand-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  box-shadow: 0 0 8px rgba(0, 224, 255, 0.6);
}
.header-actions {
  display: flex;
  gap: 4px;
}
.icon-btn {
  position: relative;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--on-surface-variant);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}
.icon-btn:hover, .icon-btn:active {
  background: var(--surface-container-highest);
  color: var(--on-surface);
}
.notif-badge {
  position: absolute;
  top: 6px; right: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--primary-container);
  color: var(--on-primary);
  font-size: 9px;
  font-weight: 700;
  font-family: var(--font-body);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--surface);
}
.notif-badge.hidden { display: none; }

/* ---- Main content area ---- */
.app-main {
  flex: 1;
  margin-top: var(--header-h);
  margin-bottom: calc(var(--nav-h) + var(--safe-bottom));
  overflow: hidden;
  position: relative;
}

/* ---- Screen transitions ---- */
.screen {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateX(20px);
  transition: opacity 0.22s ease, transform 0.22s ease;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}
.screen.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}
.screen-content {
  padding: 20px 20px 24px;
  min-height: 100%;
}

/* ---- Page titles ---- */
.page-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.page-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}
.live-chip {
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-body);
  letter-spacing: 0.06em;
  color: var(--tertiary);
  background: rgba(255, 172, 237, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  animation: pulse-live 2s ease-in-out infinite;
}
@keyframes pulse-live {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.count-chip {
  font-size: 12px;
  font-weight: 600;
  color: var(--on-surface-variant);
  background: var(--surface-container);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}
.text-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px 0;
  font-family: var(--font-body);
}
.text-btn:hover { opacity: 0.8; }

/* ---- Day tabs ---- */
.day-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}
.day-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 8px;
  background: var(--surface-container);
  border: none;
  border-radius: var(--radius-card);
  cursor: pointer;
  color: var(--on-surface-variant);
  transition: all 0.15s;
}
.day-tab.active {
  background: var(--surface-container-highest);
  color: var(--primary);
  box-shadow: 0 0 0 1.5px rgba(129, 233, 255, 0.25);
}
.day-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-family: var(--font-body);
}
.day-num {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
}

/* ---- Session cards ---- */
.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.time-block {
  margin-bottom: 4px;
}
.time-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--on-surface-variant);
  letter-spacing: 0.06em;
  padding: 12px 0 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.time-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--surface-container-high);
}

.session-card {
  background: var(--surface-container);
  border-radius: var(--radius-card);
  padding: 16px;
  margin-bottom: 10px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background 0.15s, transform 0.12s;
  border-left: 3px solid transparent;
}
.session-card:active { transform: scale(0.98); }
.session-card.bookmarked {
  border-left-color: var(--primary);
  background: linear-gradient(90deg, rgba(129,233,255,0.07) 0%, var(--surface-container) 60%);
}
.session-card.live-now {
  border-left-color: var(--tertiary);
}
.session-card.live-now .session-type {
  background: rgba(255,172,237,0.15);
  color: var(--tertiary);
}

.session-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}
.session-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.35;
  flex: 1;
}
.bookmark-btn {
  width: 32px; height: 32px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--on-surface-variant);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color 0.15s, background 0.15s;
}
.bookmark-btn.active {
  color: var(--primary);
  background: rgba(129, 233, 255, 0.1);
}

.session-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  overflow: hidden;
}
.speaker-mini {
  display: flex;
  align-items: center;
  gap: 6px;
}
.speaker-avatar-sm {
  width: 22px; height: 22px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--surface-container-highest);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
}
.speaker-name-sm {
  font-size: 12px;
  color: var(--on-surface-variant);
  font-weight: 500;
}
.session-dot { color: var(--outline); font-size: 10px; }
.room-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--on-surface-variant);
  background: var(--surface-container-high);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}
.session-type {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--on-surface-variant);
  background: var(--surface-container-high);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* ---- Search bar ---- */
.search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface-container-highest);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 20px;
  border: 1px solid transparent;
  transition: border-color 0.15s;
}
.search-bar:focus-within {
  border-color: rgba(129, 233, 255, 0.3);
}
.search-bar svg { color: var(--on-surface-variant); flex-shrink: 0; }
.search-bar input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--on-surface);
  font-family: var(--font-body);
  font-size: 15px;
}
.search-bar input::placeholder { color: var(--on-surface-variant); }

/* ---- Speakers grid ---- */
.speakers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.featured-speaker {
  grid-column: 1 / -1;
}

.speaker-card {
  background: var(--surface-container);
  border-radius: var(--radius-card);
  padding: 16px;
  cursor: pointer;
  transition: background 0.15s, transform 0.12s;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.speaker-card:active { transform: scale(0.97); }
.speaker-card.featured {
  flex-direction: row;
  gap: 16px;
  align-items: center;
  background: linear-gradient(135deg, var(--surface-container-highest), var(--surface-container-high));
}

.speaker-avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--surface-container-highest);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  flex-shrink: 0;
  border: 2px solid rgba(129, 233, 255, 0.2);
}
.speaker-card.featured .speaker-avatar {
  width: 64px; height: 64px;
  font-size: 22px;
  border-color: rgba(129, 233, 255, 0.4);
  box-shadow: 0 0 20px rgba(0, 224, 255, 0.15);
}

.speaker-info { flex: 1; min-width: 0; }
.speaker-name {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.speaker-card.featured .speaker-name { font-size: 16px; }
.speaker-title {
  font-size: 12px;
  color: var(--on-surface-variant);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.speaker-card.featured .speaker-title { font-size: 13px; }
.speaker-talk {
  font-size: 11px;
  color: var(--primary);
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---- Speaker detail ---- */
.back-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-body);
  padding: 0 0 20px;
}

.speaker-detail-header {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 24px;
}
.speaker-detail-avatar {
  width: 88px; height: 88px;
  border-radius: 24px;
  background: var(--surface-container-highest);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  flex-shrink: 0;
  border: 2px solid rgba(129, 233, 255, 0.3);
  box-shadow: 0 0 30px rgba(0, 224, 255, 0.12);
}
.speaker-detail-info {}
.speaker-detail-name {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.speaker-detail-title {
  font-size: 14px;
  color: var(--on-surface-variant);
  margin-bottom: 12px;
}
.company-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(129, 233, 255, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  margin-bottom: 10px;
  margin-top: 24px;
}
.speaker-bio {
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-surface-variant);
}
.speaker-session-card {
  background: var(--surface-container);
  border-radius: var(--radius-card);
  padding: 16px;
  border-left: 3px solid var(--primary);
}
.speaker-session-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 6px;
}
.speaker-session-meta {
  font-size: 12px;
  color: var(--on-surface-variant);
  display: flex;
  gap: 10px;
}

/* ---- Map ---- */
.floor-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}
.floor-tab {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--surface-container);
  color: var(--on-surface-variant);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.15s;
}
.floor-tab.active {
  background: rgba(129, 233, 255, 0.15);
  color: var(--primary);
}

.map-container {
  background: var(--surface-container);
  border-radius: var(--radius-card);
  padding: 20px;
  margin-bottom: 16px;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.map-container svg {
  width: 100%;
  max-height: 320px;
}
.map-legend {
  display: flex;
  gap: 16px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--on-surface-variant);
}
.legend-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--surface-container-highest);
  border: 1px solid var(--outline);
}
.legend-dot.active-dot {
  background: var(--primary);
  box-shadow: 0 0 6px rgba(129, 233, 255, 0.5);
  border-color: transparent;
}

/* Map room popup */
.room-popup {
  background: var(--surface-container-highest);
  border-radius: 12px;
  padding: 14px;
  margin-top: 12px;
  border: 1px solid rgba(129, 233, 255, 0.2);
}
.room-popup-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 8px;
  color: var(--primary);
}
.room-session-item {
  font-size: 12px;
  color: var(--on-surface-variant);
  padding: 4px 0;
  border-bottom: 1px solid rgba(68, 71, 86, 0.3);
}
.room-session-item:last-child { border-bottom: none; }

/* ---- Agenda ---- */
.agenda-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  gap: 16px;
}
.agenda-empty-icon {
  width: 64px; height: 64px;
  border-radius: 20px;
  background: var(--surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
}
.agenda-empty-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}
.agenda-empty-sub {
  font-size: 14px;
  color: var(--on-surface-variant);
  max-width: 240px;
}
.agenda-browse-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: var(--on-primary);
  border: none;
  border-radius: var(--radius-full);
  padding: 12px 28px;
  font-weight: 700;
  font-size: 14px;
  font-family: var(--font-display);
  cursor: pointer;
  margin-top: 8px;
}

.agenda-day-section { margin-bottom: 24px; }
.agenda-day-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.agenda-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px;
  background: var(--surface-container);
  border-radius: var(--radius-card);
  margin-bottom: 8px;
  border-left: 3px solid var(--primary);
}
.agenda-item.conflict-warning {
  border-left-color: var(--warning);
}
.agenda-time {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  min-width: 52px;
  padding-top: 1px;
}
.agenda-item.conflict-warning .agenda-time { color: var(--warning); }
.agenda-details { flex: 1; }
.agenda-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}
.agenda-meta {
  font-size: 12px;
  color: var(--on-surface-variant);
}
.conflict-badge {
  font-size: 10px;
  font-weight: 700;
  color: var(--warning);
  background: rgba(245, 158, 11, 0.12);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-top: 6px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.remove-btn {
  width: 28px; height: 28px;
  border: none;
  background: transparent;
  color: var(--on-surface-variant);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  flex-shrink: 0;
}
.remove-btn:hover { color: var(--error); background: rgba(255, 110, 132, 0.1); }

/* ---- Notifications ---- */
.notifications-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.notif-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px;
  border-radius: var(--radius-card);
  transition: background 0.15s;
  cursor: pointer;
}
.notif-item.unread {
  background: var(--surface-container);
  border-left: 3px solid var(--primary);
}
.notif-item.read {
  border-left: 3px solid transparent;
  opacity: 0.65;
}
.notif-item:hover { background: var(--surface-container-high); }
.notif-icon {
  width: 38px; height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.notif-icon.reminder { background: rgba(129, 233, 255, 0.12); color: var(--primary); }
.notif-icon.speaker { background: rgba(255, 172, 237, 0.12); color: var(--tertiary); }
.notif-icon.update { background: rgba(245, 158, 11, 0.12); color: var(--warning); }
.notif-icon.live { background: rgba(16, 185, 129, 0.12); color: var(--success); }

.notif-body { flex: 1; }
.notif-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--on-surface);
  margin-bottom: 3px;
  line-height: 1.3;
}
.notif-desc {
  font-size: 12px;
  color: var(--on-surface-variant);
  line-height: 1.4;
}
.notif-time {
  font-size: 11px;
  color: var(--on-surface-variant);
  flex-shrink: 0;
  padding-top: 2px;
}

/* ---- Bottom navigation ---- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  overflow: hidden;
  height: calc(var(--nav-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: rgba(10, 14, 26, 0.82);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid rgba(68, 71, 86, 0.25);
  display: flex;
  align-items: flex-start;
  z-index: 100;
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: var(--nav-h);
  border: none;
  background: transparent;
  color: var(--on-surface-variant);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 500;
  transition: color 0.15s;
  position: relative;
  min-width: 0;
  padding: 0 2px;
}
.nav-item svg { transition: transform 0.15s; }
.nav-item:active svg { transform: scale(0.88); }
.nav-item.active {
  color: var(--primary);
}
.nav-item.active::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px; height: 2px;
  border-radius: 1px;
  background: linear-gradient(90deg, var(--primary), var(--primary-container));
}

/* ---- Scrollbar ---- */
.screen::-webkit-scrollbar { width: 2px; }
.screen::-webkit-scrollbar-track { background: transparent; }
.screen::-webkit-scrollbar-thumb { background: var(--outline-variant); border-radius: 1px; }

/* ---- Utility ---- */
.hidden { display: none !important; }

/* ---- Desktop enhancement ---- */
@media (min-width: 480px) {
  .app {
    box-shadow: 0 0 80px rgba(0, 0, 0, 0.6);
    border-left: 1px solid rgba(68, 71, 86, 0.2);
    border-right: 1px solid rgba(68, 71, 86, 0.2);
  }
  body { background: #050710; }
}

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: calc(var(--nav-h) + 16px + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--surface-container-highest);
  color: var(--on-surface);
  font-size: 13px;
  font-weight: 500;
  padding: 11px 20px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(68, 71, 86, 0.5);
  white-space: nowrap;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 200;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  pointer-events: none;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
}