/* ClaseHub · capa visual moderna.
   Se carga después de layout.css y antes de theme-dark.css. Usa variables para
   que el modo oscuro solo tenga que redefinir los tokens. */

:root {
  --brand-navy: #15426f;
  --primary: #2563b8;
  --primary-dark: #1d4f99;
  --primary-soft: rgba(37, 99, 184, .1);
  --ring: rgba(37, 99, 184, .22);
  --ink: #0f172a;
  --text-2: #334155;
  --muted: #5b6b80;
  --ice: #f5f7fb;
  --paper: #ffffff;
  --line: #e5eaf1;
  --line-strong: #d5dde8;
  --surface: #ffffff;
  --surface-2: #f7f9fc;
  --surface-3: #eef3f9;
  --accent-soft: #eaf1fb;
  --sky: #2563b8;
  --shadow-xs: 0 1px 2px rgba(16, 24, 40, .05);
  --shadow-sm: 0 1px 3px rgba(16, 24, 40, .07), 0 1px 2px rgba(16, 24, 40, .04);
  --shadow-md: 0 10px 28px rgba(16, 24, 40, .09), 0 2px 6px rgba(16, 24, 40, .04);
  --shadow-lg: 0 24px 64px rgba(16, 24, 40, .2);
  --shadow: var(--shadow-sm);
  --shadow-hover: var(--shadow-md);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --font-ui: 'Inter', 'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Manrope', 'Inter', system-ui, sans-serif;
}

/* ---------- Base ---------- */

html,
body {
  background: var(--ice);
}

body {
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 14.5px;
  font-feature-settings: 'cv05', 'cv11', 'ss03';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  scrollbar-color: var(--line-strong) transparent;
  scrollbar-width: thin;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.main {
  background-color: var(--ice);
  background-image: none;
}

.content {
  padding-top: 28px;
}

/* ---------- Menú lateral ---------- */

.app-shell .sidebar {
  border-right: 1px solid var(--line);
  background: var(--surface);
}

.app-shell .nav button {
  gap: 11px;
  border-radius: 9px;
  color: var(--text-2);
  padding: 9px 11px;
  font-size: 13.5px;
  font-weight: 500;
}

.app-shell .nav svg {
  width: 18px;
  height: 18px;
  color: var(--muted);
}

.app-shell .nav button:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.app-shell .nav button:hover svg {
  color: var(--ink);
}

.app-shell .nav button.active {
  background: var(--accent-soft);
  color: var(--primary);
  font-weight: 600;
  box-shadow: none;
}

.app-shell .nav button.active svg {
  color: var(--primary);
}

.nav-label {
  padding-bottom: 6px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .08em;
}

.nav-badge {
  font-family: var(--font-ui);
}

.app-shell .mini-profile {
  border-color: var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.app-shell .mini-profile:hover {
  border-color: var(--line-strong);
}

.app-shell .logout {
  color: var(--muted);
  font-weight: 600;
}

/* ---------- Barra superior ---------- */

.topbar {
  height: 64px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .78);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
}

.topbar h1 {
  margin-top: 2px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.02em;
}

.eyebrow {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .1em;
}

.notifications-panel {
  top: 70px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.chat-online {
  top: 84px;
}

.bell,
.icon-button,
.search-trigger,
.menu-button {
  height: 38px;
  border-color: var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.bell,
.icon-button {
  width: 38px;
}

.search-trigger {
  color: var(--muted);
  font-weight: 500;
}

.bell:hover,
.icon-button:hover,
.search-trigger:hover {
  border-color: var(--line-strong);
  background: var(--surface-2);
  color: var(--ink);
}

kbd {
  border-color: var(--line);
  border-radius: 6px;
  background: var(--surface-2);
  font-family: var(--font-ui);
  font-weight: 600;
}

.topbar-avatar .avatar {
  width: 38px;
  height: 38px;
}

/* ---------- Cabeceras de sección ---------- */

.hero {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.hero::before,
.hero::after {
  display: none;
}

.hero h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.035em;
}

.hero p {
  color: var(--muted);
}

/* Cabecera compacta en todas las secciones salvo Inicio */
.hero:not(.dashboard-hero) {
  min-height: 0;
  align-items: center;
  margin-bottom: 20px;
  padding: 22px 26px;
}

.hero:not(.dashboard-hero) h2 {
  margin: 4px 0 4px;
  font-size: 26px;
  line-height: 1.15;
}

.hero:not(.dashboard-hero) p {
  font-size: 13.5px;
}

/* Inicio: cabecera amplia con un degradado suave de la marca */
.dashboard-hero {
  padding: 30px 32px;
  background:
    radial-gradient(900px 260px at 100% 0%, rgba(37, 99, 184, .1), transparent 65%),
    radial-gradient(500px 220px at 0% 100%, rgba(21, 66, 111, .05), transparent 70%),
    var(--surface);
}

.dashboard-hero h2 {
  font-size: 32px;
  line-height: 1.1;
}

.hero-quickfacts span {
  border-color: var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  padding: 5px 10px;
  font-weight: 600;
}

.hero-quickfacts b {
  color: var(--ink);
  font-family: var(--font-ui);
  font-weight: 700;
}

.next-class {
  border-color: var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.next-class:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.next-class strong {
  font-family: var(--font-display);
}

/* ---------- Botones ---------- */

.hero-action,
.primary {
  border-radius: 10px;
  background: var(--primary);
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -.005em;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .1), inset 0 1px 0 rgba(255, 255, 255, .14);
}

.hero-action:hover,
.primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(37, 99, 184, .25), inset 0 1px 0 rgba(255, 255, 255, .14);
  transform: translateY(-1px);
}

.hero-action:active,
.primary:active {
  transform: translateY(0);
}

.hero-action--classroom {
  background: #1e8e3e;
}

.hero-action--classroom:hover {
  background: #137333;
  box-shadow: 0 4px 12px rgba(30, 142, 62, .25), inset 0 1px 0 rgba(255, 255, 255, .14);
}

.secondary {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-2);
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow-xs);
}

.secondary:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.link-btn {
  color: var(--primary);
  font-weight: 600;
}

.link-btn:hover {
  color: var(--primary-dark);
  transform: none;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.content-actions button,
.table-action,
.access-code button {
  border-radius: 8px;
  font-weight: 600;
}

/* ---------- Tarjetas ---------- */

.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-sm);
}

.card h3,
.card-head h3 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.02em;
}

.note,
.announcement,
.agenda-item {
  border-color: var(--line);
}

.note {
  border-radius: 10px;
  background: var(--surface-2);
}

.note:hover {
  border-color: var(--line-strong);
  background: var(--surface-3);
}

.note-icon,
.quick-link-icon,
.empty-icon,
.search-result-icon {
  background: var(--accent-soft);
  color: var(--primary);
}

.note-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.metric {
  font-family: var(--font-display);
}

.quick-link {
  border-color: var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.quick-link:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.empty-block {
  border-color: var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface-2);
}

/* ---------- Etiquetas y chips ---------- */

.tag {
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--primary);
  padding: 3px 9px;
  font-size: 10.5px;
  font-weight: 700;
}

.tag.lime {
  background: #e8f7ef;
  color: #0f7a4a;
}

.chip {
  border-color: var(--line);
  background: var(--surface);
  color: var(--text-2);
  font-weight: 600;
}

.chip:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}

.chip.active {
  border-color: var(--ink);
  background: var(--ink);
  color: #fff;
}

/* ---------- Formularios ---------- */

.form-input,
.search,
.filter,
.code-input,
.chat-composer textarea,
.calendar-jump {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.search,
.form-input {
  padding: 10px 12px;
  font-size: 13.5px;
}

.filter {
  font-weight: 600;
}

.form-input:focus,
.search:focus,
.filter:focus,
.code-input:focus,
.chat-composer textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--ring);
  outline: none;
}

.form-group label,
.login-label {
  color: var(--text-2);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}

.event-kind span {
  border-radius: 10px;
  font-weight: 600;
}

/* ---------- Tablas ---------- */

.table th {
  background: var(--surface-2);
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
}

.table th:first-child {
  border-top-left-radius: 8px;
}

.table th:last-child {
  border-top-right-radius: 8px;
}

.table th,
.table td {
  border-color: var(--line);
}

.table tbody tr:hover td {
  background: var(--surface-2);
}

/* ---------- Ventanas y avisos ---------- */

.modal-backdrop {
  background: rgba(15, 23, 42, .45);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  animation: backdrop-in .16s ease-out;
}

.modal {
  border-color: var(--line);
  border-radius: 18px;
  background: var(--surface);
  padding: 26px;
  box-shadow: var(--shadow-lg);
  animation: modal-in .2s cubic-bezier(.2, .8, .2, 1);
}

.modal h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.03em;
}

@keyframes backdrop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modal-in {
  from { opacity: 0; transform: translateY(8px) scale(.98); }
  to { opacity: 1; transform: none; }
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 12px;
  background: #0f172a;
  color: #f8fafc;
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  font-weight: 500;
}

.toast::before {
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 3px rgba(52, 211, 153, .2);
  content: '';
}

/* ---------- Agenda ---------- */

.calendar-toolbar,
.day-agenda,
.week-strip button {
  border-color: var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.calendar-toolbar {
  border-radius: 14px;
}

.day-agenda {
  border-radius: 14px;
}

.day-agenda.today {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.week-strip button {
  border-radius: 12px;
}

.week-strip button.selected {
  border-color: var(--primary);
  background: var(--accent-soft);
}

.calendar-control {
  border-color: var(--line);
  border-radius: 10px;
}

.calendar-event {
  border-radius: 10px;
}

/* ---------- Chat ---------- */

.chat-card {
  overflow: hidden;
}

.chat-head {
  border-color: var(--line);
  background: var(--surface);
}

.chat-messages {
  background: var(--surface-2);
}

.chat-bubble {
  border: 1px solid var(--line);
  border-radius: 6px 16px 16px 16px;
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.chat-bubble p {
  color: var(--text-2);
  font-size: 13px;
}

.chat-message.own .chat-bubble {
  border-color: transparent;
  border-radius: 16px 6px 16px 16px;
  background: var(--primary);
}

.chat-message.own .chat-bubble p,
.chat-message.own .chat-bubble header strong {
  color: #fff;
}

.chat-message.own .chat-bubble header time,
.chat-message.own .chat-bubble header button {
  color: rgba(255, 255, 255, .75);
}

.chat-message.own .chat-bubble header span {
  background: rgba(255, 255, 255, .18);
  color: #fff;
}

.chat-message.own .mention,
.chat-message.own .mention.mention-me {
  background: rgba(255, 255, 255, .2);
  color: #fff;
}

.chat-composer {
  border-color: var(--line);
  background: var(--surface);
}

.chat-live {
  border-color: #bfe9d4;
  background: #ecfbf3;
}

.mention-box {
  border-color: var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
}

/* ---------- Pantalla de acceso ---------- */

.login-wrap {
  background:
    radial-gradient(700px 420px at 15% 10%, rgba(37, 99, 184, .12), transparent 60%),
    radial-gradient(600px 380px at 90% 90%, rgba(21, 66, 111, .08), transparent 60%),
    var(--ice);
}

.login-wrap::before,
.login-wrap::after {
  display: none;
}

.login-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}

.login-card h1 {
  font-family: var(--font-display);
  letter-spacing: -.035em;
}

.login-card .demo-hint {
  margin: 14px 0 0;
  line-height: 1.5;
}

.login-request {
  width: 100%;
  margin-top: 10px;
}

.name-choice {
  border-color: var(--line);
  border-radius: 12px;
  background: var(--surface);
  font-weight: 600;
}

.name-choice:hover {
  border-color: var(--line-strong);
  background: var(--surface-2);
}

.name-choice.selected {
  border-color: var(--primary);
  background: var(--accent-soft);
  color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

/* ---------- Avatar ---------- */

.avatar {
  background: linear-gradient(135deg, var(--brand-navy), var(--primary));
  box-shadow: none;
}

/* ---------- Móvil ---------- */

@media (max-width: 650px) {
  .topbar {
    height: 60px;
  }

  .notifications-panel {
    top: 66px;
  }

  .hero:not(.dashboard-hero) {
    padding: 18px;
  }

  .hero:not(.dashboard-hero) h2 {
    font-size: 23px;
  }

  .dashboard-hero {
    padding: 22px 20px;
  }

  .dashboard-hero h2 {
    font-size: 26px;
  }

  .toast {
    right: 14px;
    bottom: 14px;
    left: 14px;
    max-width: none;
  }
}