/* ============================================================
   CUMBRE MONTEVIDEO 2026 — Design System & Base Layout
   ============================================================ */

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

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  /* Colors — Dark theme (default) */
  --bg-base:        #0A0F1E;
  --bg-surface:     #0F1629;
  --bg-elevated:    #151C32;
  --bg-hover:       #1A2340;

  --accent-primary:   #38BDF8;
  --accent-secondary: #F59E0B;
  --accent-primary-rgb: 56, 189, 248;
  --accent-secondary-rgb: 245, 158, 11;

  --text-primary:   #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-tertiary:  rgba(255, 255, 255, 0.4);
  --text-inverse:   #0A0F1E;

  /* Glass */
  --glass-bg:       rgba(255, 255, 255, 0.04);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-border:   rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);
  --glass-shadow:   0 4px 24px rgba(0, 0, 0, 0.3);
  --glass-blur:     16px;

  /* Room colors */
  --room-azul:       #38BDF8;
  --room-ceremonias: #A78BFA;
  --room-rojo:       #F87171;
  --room-dorado:     #F59E0B;
  --room-all:        #6B7280;

  /* Type borders */
  --type-book:   var(--accent-secondary);
  --type-panel:  #A78BFA;
  --type-talk:   transparent;
  --type-break:  rgba(255, 255, 255, 0.06);

  /* 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;

  /* Radius */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  20px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs:   0.7rem;
  --font-size-sm:   0.8rem;
  --font-size-base: 0.925rem;
  --font-size-md:   1.05rem;
  --font-size-lg:   1.25rem;
  --font-size-xl:   1.5rem;
  --font-size-2xl:  2rem;
  --font-size-3xl:  2.5rem;
  --font-weight-normal:   400;
  --font-weight-medium:   500;
  --font-weight-semibold: 600;
  --font-weight-bold:     700;
  --font-weight-extrabold:800;
  --font-weight-black:    900;
  --line-height-tight:  1.2;
  --line-height-normal: 1.5;

  /* 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:   350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index scale */
  --z-base:     1;
  --z-sticky:   10;
  --z-overlay:  100;
  --z-modal:    200;
  --z-toast:    300;

  /* Layout */
  --header-height:  64px;
  --tabs-height:    52px;
  --filters-height: 48px;
  --max-width:      1400px;
  --slot-height:    140px;
}

/* ── Light theme ──────────────────────────────────────────── */
[data-theme="light"] {
  --bg-base:        #F0F4F8;
  --bg-surface:     #FFFFFF;
  --bg-elevated:    #FFFFFF;
  --bg-hover:       #E8EDF4;

  --text-primary:   #0F172A;
  --text-secondary: rgba(15, 23, 42, 0.65);
  --text-tertiary:  rgba(15, 23, 42, 0.4);
  --text-inverse:   #FFFFFF;

  --glass-bg:       rgba(255, 255, 255, 0.7);
  --glass-bg-hover: rgba(255, 255, 255, 0.85);
  --glass-border:   rgba(15, 23, 42, 0.1);
  --glass-border-hover: rgba(15, 23, 42, 0.2);
  --glass-shadow:   0 4px 24px rgba(0, 0, 0, 0.08);

  --type-break: rgba(15, 23, 42, 0.06);
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-base);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font: inherit; border: none; background: none; color: inherit; outline: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}
[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
}

/* ── Focus visible ────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* ── Layout ───────────────────────────────────────────────── */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}

[data-theme="light"] .header {
  background: rgba(240, 244, 248, 0.85);
}

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

.header__logo-img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  flex-shrink: 0;
}

.header__logo {
  display: flex;
  flex-direction: column;
  line-height: var(--line-height-tight);
}

.header__logo-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-extrabold);
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__logo-subtitle {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

/* Day Tabs */
.day-tabs {
  position: sticky;
  top: var(--header-height);
  z-index: var(--z-sticky);
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: rgba(10, 15, 30, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

[data-theme="light"] .day-tabs {
  background: rgba(240, 244, 248, 0.75);
}

/* Toolbar (search + filters row) */
.toolbar {
  position: sticky;
  top: calc(var(--header-height) + var(--tabs-height));
  z-index: calc(var(--z-sticky) - 1);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-lg);
  background: rgba(10, 15, 30, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}

[data-theme="light"] .toolbar {
  background: rgba(240, 244, 248, 0.6);
}

/* Main */
.main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg);
}

/* Schedule — Time Block layout */
.schedule {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.time-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.time-block__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  position: sticky;
  top: calc(var(--header-height) + var(--tabs-height) + var(--filters-height));
  z-index: calc(var(--z-sticky) - 2);
  background: var(--bg-base);
}

[data-theme="light"] .time-block__header {
  background: var(--bg-base);
}

.time-block__time {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-black);
  color: var(--accent-primary);
  white-space: nowrap;
  letter-spacing: -0.02em;
}

.time-block__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--glass-border-hover), transparent);
}

.time-block__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

/* Timeline (mobile) */
.timeline {
  display: none;
  flex-direction: column;
  gap: var(--space-sm);
}

/* Room chips (mobile) */
.room-chips {
  display: none;
  gap: var(--space-xs);
  padding: var(--space-xs) 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.room-chips::-webkit-scrollbar { display: none; }

/* Footer */
.footer {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
  border-top: 1px solid var(--glass-border);
}

.footer a {
  color: var(--accent-primary);
  transition: opacity var(--transition-fast);
}

.footer a:hover { opacity: 0.8; }

.footer__credit {
  margin-top: var(--space-sm);
  font-size: var(--font-size-xs);
  opacity: 0.6;
}

/* ── Agenda Panel (overlay) ───────────────────────────────── */
.agenda-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  justify-content: flex-end;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.agenda-overlay.is-open {
  opacity: 1;
  pointer-events: all;
}

.agenda-overlay__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
}

.agenda-panel {
  position: relative;
  width: 100%;
  max-width: 520px;
  height: 100%;
  background: var(--bg-surface);
  border-left: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
}

.agenda-overlay.is-open .agenda-panel {
  transform: translateX(0);
}

.agenda-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--glass-border);
  flex-shrink: 0;
}

.agenda-panel__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-extrabold);
}

.agenda-panel__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
}

.agenda-panel__footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--glass-border);
  flex-shrink: 0;
}

/* Agenda empty state */
.agenda-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-3xl) var(--space-lg);
  color: var(--text-tertiary);
  text-align: center;
}

.agenda-empty__icon {
  font-size: 3rem;
  opacity: 0.4;
}

/* Agenda day group */
.agenda-day-group {
  margin-bottom: var(--space-lg);
}

.agenda-day-group__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-xs) 0;
  margin-bottom: var(--space-sm);
  border-bottom: 1px solid var(--glass-border);
}

/* Conflict alert */
.conflict-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-sm);
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: var(--radius-md);
  color: #F87171;
  font-size: var(--font-size-sm);
}

.conflict-alert__icon { flex-shrink: 0; }

/* Toast */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  z-index: var(--z-toast);
  padding: var(--space-sm) var(--space-lg);
  background: var(--accent-primary);
  color: var(--text-inverse);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-full);
  box-shadow: 0 8px 32px rgba(56, 189, 248, 0.3);
  transition: transform var(--transition-base);
  pointer-events: none;
}

.toast.is-visible {
  transform: translateX(-50%) translateY(0);
}

/* Import URL modal */
.import-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.import-modal.is-open {
  opacity: 1;
  pointer-events: all;
}

.import-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
}

.import-modal__content {
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 400px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.import-modal__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-extrabold);
}

.import-modal__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

/* ── Utility classes ──────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* "Now" live indicator */
.now-indicator {
  position: relative;
}

.now-indicator::before {
  content: "EN VIVO";
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  padding: 2px 8px;
  font-size: 0.6rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #FFF;
  background: #EF4444;
  border-radius: var(--radius-full);
  animation: pulse-live 2s ease-in-out infinite;
  z-index: 2;
}