/* Plataforma Marcelo Rocha — design tokens (mesma paleta do Figma) */

:root {
  --color-bg-canvas: #F4F6F9;
  --color-bg-surface: #FFFFFF;
  --color-bg-elevated: #FFFFFF;
  --color-bg-brand: #C5A137;
  --color-bg-brand-hover: #AE8641;
  --color-bg-brand-subtle: #FBF6E9;
  --color-bg-danger-subtle: #FDEDED;

  --color-text-primary: #071B2C;
  --color-text-secondary: #3D4A61;
  --color-text-muted: #7C8CA3;
  --color-text-on-brand: #071B2C;
  --color-text-brand: #8C6B34;
  --color-text-danger: #C93A3E;
  --color-text-success: #178055;

  --color-border: #D3DAE3;
  --color-border-subtle: #E7EBF1;
  --color-border-focus: #C5A137;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

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

  --shadow-sm: 0 1px 2px rgba(7, 27, 44, 0.06);
  --shadow-md: 0 4px 8px rgba(7, 27, 44, 0.08);
  --shadow-lg: 0 10px 20px rgba(7, 27, 44, 0.12);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  color-scheme: light;
}

[data-theme="dark"] {
  --color-bg-canvas: #000627;
  --color-bg-surface: #071B2C;
  --color-bg-elevated: #132234;
  --color-bg-brand: #DAB035;
  --color-bg-brand-hover: #DFC066;
  --color-bg-brand-subtle: #4A381A;
  --color-bg-danger-subtle: #4D1315;

  --color-text-primary: #F4F6F9;
  --color-text-secondary: #AEB9C8;
  --color-text-muted: #566178;
  --color-text-on-brand: #071B2C;
  --color-text-brand: #EBD582;
  --color-text-danger: #E5484D;
  --color-text-success: #22A06B;

  --color-border: #253347;
  --color-border-subtle: #132234;
  --color-border-focus: #DAB035;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.45);

  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg-canvas);
  color: var(--color-text-primary);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Base de acessibilidade: fontes maiores, alvos de toque generosos
   (o público inclui usuários com pouca familiaridade com tecnologia). */
h1 { font-size: 30px; margin: 0 0 var(--space-md); }
h2 { font-size: 24px; margin: 0 0 var(--space-md); }
h3 { font-size: 20px; margin: 0 0 var(--space-sm); }
p { margin: 0 0 var(--space-md); }

a {
  color: var(--color-text-brand);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ---- Botões ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  min-height: 44px;
  transition: background-color .15s ease, border-color .15s ease;
}
.btn-primary {
  background: var(--color-bg-brand);
  color: var(--color-text-on-brand);
}
.btn-primary:hover { background: var(--color-bg-brand-hover); }
.btn-secondary {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-text-muted); }
.btn-danger {
  background: var(--color-bg-danger-subtle);
  color: var(--color-text-danger);
}
.btn-block { width: 100%; }
.btn-sm { padding: var(--space-xs) var(--space-md); font-size: 14px; min-height: 36px; }

/* ---- Formulários ---- */
label {
  display: block;
  font-weight: 600;
  font-size: 15px;
  margin-bottom: var(--space-xs);
}
input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="date"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: 16px;
  font-family: inherit;
  color: var(--color-text-primary);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 44px;
}
textarea { min-height: 88px; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(197, 161, 55, 0.25);
}
.field { margin-bottom: var(--space-md); }
.field-help { font-size: 14px; color: var(--color-text-muted); margin-top: var(--space-xs); }
.field-error { font-size: 14px; color: var(--color-text-danger); margin-top: var(--space-xs); }
.checkbox-row { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-sm); }
.checkbox-row input { width: 20px; height: 20px; }
.checkbox-row label { margin: 0; font-weight: 400; }

/* ---- Cartões / superfícies ---- */
.card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}
.auth-card {
  width: 100%;
  max-width: 420px;
  padding: var(--space-xl);
}
.auth-card .brand {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--color-text-brand);
  margin-bottom: var(--space-sm);
}

/* ---- Alertas ---- */
.alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  font-size: 15px;
}
.alert-success { background: rgba(23, 128, 85, .12); color: var(--color-text-success); }
.alert-error { background: var(--color-bg-danger-subtle); color: var(--color-text-danger); }
.alert-info { background: var(--color-bg-brand-subtle); color: var(--color-text-brand); }

/* ---- Layout com sidebar (dashboard aluno/admin) ---- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--color-bg-surface);
  border-right: 1px solid var(--color-border-subtle);
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
}
.sidebar .logo { font-weight: 700; font-size: 16px; margin-bottom: var(--space-lg); padding: 0 var(--space-sm); }
.sidebar nav { display: flex; flex-direction: column; gap: var(--space-xs); flex: 1; }
.sidebar nav a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-weight: 600;
}
.sidebar nav a:hover { background: var(--color-bg-brand-subtle); text-decoration: none; }
.sidebar nav a.active { background: var(--color-bg-brand-subtle); color: var(--color-text-brand); }
.sidebar .logout-link { color: var(--color-text-muted); font-weight: 600; padding: var(--space-sm) var(--space-md); }
.main-content { flex: 1; padding: var(--space-xl) var(--space-2xl); min-width: 0; }

/* ---- Grade de cursos ---- */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
}
.course-card { overflow: hidden; }
.course-card .cover {
  aspect-ratio: 16 / 9;
  background: var(--color-bg-brand-subtle);
  background-size: cover;
  background-position: center;
}
.course-card .body { padding: var(--space-md); }
.course-card h3 { font-size: 18px; margin-bottom: var(--space-sm); }
.progress-track {
  height: 6px;
  border-radius: 999px;
  background: var(--color-border-subtle);
  overflow: hidden;
  margin-bottom: var(--space-xs);
}
.progress-fill { height: 100%; background: var(--color-bg-brand); }
.meta { font-size: 14px; color: var(--color-text-muted); margin-bottom: var(--space-xs); }

/* ---- Player de aula ---- */
.player-layout { display: flex; gap: 0; align-items: flex-start; }
.player-main { flex: 1; padding: var(--space-xl); min-width: 0; }
.video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.video-wrapper iframe {
  position: absolute; inset: 0; width: 100%; height: 100%; border: 0;
}
/* Bloqueio "de uso casual", não à prova de extração (ver PRD):
   modestbranding+rel=0 no embed tiram a maior parte dos links de saída,
   e oncontextmenu no wrapper desativa o menu de botão direito. Um overlay
   cobrindo o iframe inteiro quebraria o botão de play/pause, por isso não
   usamos um. */
.lesson-sidebar {
  width: 360px;
  flex-shrink: 0;
  background: var(--color-bg-surface);
  padding: var(--space-xl) var(--space-lg);
  min-height: 100vh;
}
.lesson-sidebar h2 { font-size: 18px; }
.lesson-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2xs);
  color: var(--color-text-primary);
}
.lesson-item:hover { background: var(--color-bg-brand-subtle); text-decoration: none; }
.lesson-item.active { background: var(--color-bg-brand-subtle); color: var(--color-text-brand); font-weight: 600; }
.lesson-item.locked { color: var(--color-text-muted); cursor: default; }
.lesson-item .icon { width: 18px; text-align: center; flex-shrink: 0; }
.lesson-item .title { flex: 1; font-size: 15px; }

/* ---- Comentários ---- */
.comment {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  margin-bottom: var(--space-sm);
}
.comment.by-admin { background: var(--color-bg-brand-subtle); }
.comment .author { font-weight: 600; font-size: 15px; margin-bottom: var(--space-xs); color: var(--color-text-primary); }
.comment.by-admin .author { color: var(--color-text-brand); }
.comment .text { font-size: 15px; color: var(--color-text-secondary); white-space: pre-wrap; }
.comment-form { display: flex; gap: var(--space-sm); margin-top: var(--space-md); }
.comment-form textarea { flex: 1; min-height: 44px; resize: vertical; }

/* ---- Tabelas / listas admin ---- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: var(--space-sm) var(--space-md); border-bottom: 1px solid var(--color-border-subtle); font-size: 15px; }
th { color: var(--color-text-muted); font-weight: 600; }
.list-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2xs);
  background: var(--color-bg-elevated);
}
.list-row.active-row { background: var(--color-bg-brand-subtle); }
.list-row a { color: var(--color-text-primary); font-weight: 600; }

.badge {
  display: inline-block;
  padding: 2px var(--space-sm);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.badge-success { background: rgba(23, 128, 85, .12); color: var(--color-text-success); }
.badge-muted { background: var(--color-border-subtle); color: var(--color-text-muted); }

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  gap: var(--space-md);
  flex-wrap: wrap;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: 14px;
}

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

@media (max-width: 900px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; overflow-x: auto; }
  .sidebar nav { flex-direction: row; }
  .sidebar .logo { display: none; }
  .main-content { padding: var(--space-lg); }
  .player-layout { flex-direction: column; }
  .lesson-sidebar { width: 100%; min-height: auto; }
}