:root {
  --ink: #1B2A4A;
  --bg: #EDF1F4;
  --bg-panel: #FFFFFF;
  --accent: #FF7A29;
  --accent-dark: #E35F0F;
  --teal: #12857A;
  --text-muted: #5B6B7F;
  --border: #D7DEE4;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font-family: var(--font-body); background: var(--bg); color: var(--ink); }
h1, h2 { font-family: var(--font-display); margin: 0 0 4px; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 24px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 8px; border: none;
  font-weight: 600; font-size: 0.9rem; cursor: pointer; font-family: var(--font-body);
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { background: none; border: 1px solid var(--border); color: var(--ink); }
.btn-block { width: 100%; margin-top: 6px; }

/* Login */
.login-screen { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card { background: var(--bg-panel); border-radius: 14px; padding: 32px 28px; width: 100%; max-width: 360px; border: 1px solid var(--border); }
.subtitle { color: var(--text-muted); margin-bottom: 20px; }
.login-card label { display: block; font-size: 0.85rem; font-weight: 600; margin: 14px 0 6px; }
.login-card input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-family: var(--font-body); }
.password-field-wrap { position: relative; }
.password-field-wrap input { padding-right: 42px; }
.password-toggle-btn {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer; font-size: 1.05rem;
  padding: 6px 8px; line-height: 1; opacity: 0.6;
}
.password-toggle-btn:hover { opacity: 1; }
.error-text { color: #C0392B; font-size: 0.85rem; margin-top: 12px; }
.login-hint { font-size: 0.82rem; color: var(--text-muted); margin-top: 14px; text-align: center; }
.login-hint a { color: var(--teal); }

/* Course list */
.aluno-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; }

.aluno-layout { display: grid; grid-template-columns: 1fr 300px; gap: 24px; align-items: start; }
@media (max-width: 760px) { .aluno-layout { grid-template-columns: 1fr; } }

.courses-list { display: grid; gap: 16px; }
.course-item {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; display: flex; align-items: center; gap: 16px; cursor: pointer;
  border-left: 4px solid var(--accent);
}
.course-item:hover { border-color: var(--teal); border-left-color: var(--accent); }
.course-item img { width: 88px; height: 56px; object-fit: cover; border-radius: 6px; background: #DCE3E9; flex-shrink: 0; }
.course-item h3 { margin: 0 0 4px; font-size: 1rem; font-family: var(--font-display); }
.course-item-teacher { margin: 0 0 4px; font-size: 0.78rem; color: var(--teal); font-weight: 600; }
.course-item p { margin: 0; color: var(--text-muted); font-size: 0.85rem; }
.empty-text { color: var(--text-muted); }

/* Sidebar: other courses available for purchase */
.sidebar {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; position: sticky; top: 24px;
}
.sidebar h3 { font-size: 0.95rem; margin-bottom: 12px; }
.sidebar-item { padding: 12px 0; border-top: 1px solid var(--border); }
.sidebar-item:first-child { border-top: none; padding-top: 0; }
.sidebar-item h4 { margin: 0 0 4px; font-size: 0.9rem; font-family: var(--font-display); }
.sidebar-teacher { display: block; font-size: 0.75rem; color: var(--teal); font-weight: 600; margin-bottom: 4px; }
.sidebar-item .price { color: var(--accent-dark); font-weight: 600; font-size: 0.85rem; display: block; margin-bottom: 8px; }
.sidebar-item .btn { width: 100%; padding: 8px 12px; font-size: 0.82rem; }
.sidebar-empty { color: var(--text-muted); font-size: 0.85rem; }

/* Player */
.video-wrap { position: relative; width: 100%; aspect-ratio: 16/9; background: #000; border-radius: 12px; overflow: hidden; margin: 16px 0; }
.video-wrap iframe { width: 100%; height: 100%; border: 0; }
.player-description { color: var(--text-muted); line-height: 1.6; white-space: pre-line; }
#download-btn { margin-top: 8px; }