:root {
  --blue: #0066b3;
  --teal: #00a99d;
  --dark: #0f172a;
  --muted: #64748b;
  --bg: #f8fafc;
  --card: #fff;
  --border: #e2e8f0;
  --font: 'DM Sans', system-ui, sans-serif;
  --display: 'Fraunces', Georgia, serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--bg); color: var(--dark); min-height: 100vh; }

/* Login */
.login-screen { min-height: 100vh; display: grid; place-items: center; padding: 1.5rem; background: linear-gradient(135deg, #e8f4fd 0%, #f8fafc 50%, #e6f7f5 100%); }
.login-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; max-width: 900px; width: 100%; align-items: center; }
.login-brand h1 { font-family: var(--display); font-size: 1.75rem; margin: 1rem 0 0.5rem; }
.login-brand p { color: var(--muted); line-height: 1.6; }
.login-features { list-style: none; margin-top: 1.5rem; }
.login-features li { padding: 0.4rem 0; padding-left: 1.25rem; position: relative; font-size: 0.92rem; color: var(--muted); }
.login-features li::before { content: '✓'; position: absolute; left: 0; color: var(--teal); font-weight: 700; }

.login-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 2rem; box-shadow: 0 20px 50px rgba(0,102,179,.1);
}
.login-card h2 { font-family: var(--display); margin-bottom: 0.25rem; }
.login-card p { color: var(--muted); font-size: 0.88rem; margin-bottom: 1.25rem; }
.login-card label { display: block; font-size: 0.82rem; font-weight: 600; margin-bottom: 0.35rem; }
.login-card input { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--border); border-radius: 8px; font: inherit; margin-bottom: 1rem; }
.login-card__hint { text-align: center; font-size: 0.85rem; color: var(--muted); margin-top: 1rem; }
.login-card__hint a { color: var(--blue); }
.error-msg { color: #dc2626; font-size: 0.85rem; margin-top: 0.75rem; }

/* Portal shell */
.portal-shell { min-height: 100vh; display: flex; flex-direction: column; }
.portal-header {
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 0.85rem 1.5rem; display: flex; justify-content: space-between; align-items: center;
  position: sticky; top: 0; z-index: 10;
}
.portal-header__brand { display: flex; align-items: center; gap: 0.75rem; }
.portal-header__badge { font-size: 0.72rem; font-weight: 600; background: #e8f4fd; color: var(--blue); padding: 0.2rem 0.55rem; border-radius: 999px; }
.portal-header__user { display: flex; align-items: center; gap: 0.75rem; font-size: 0.88rem; }

.portal-body { display: flex; flex: 1; }
.portal-sidebar {
  width: 300px; background: var(--card); border-right: 1px solid var(--border);
  padding: 1.25rem; overflow-y: auto; position: sticky; top: 57px; height: calc(100vh - 57px);
}
.portal-main { flex: 1; padding: 1.5rem; overflow-y: auto; }

.progress-card { background: linear-gradient(135deg, #e8f4fd, #e6f7f5); border-radius: 12px; padding: 1rem; margin-bottom: 1.25rem; }
.progress-card__header { display: flex; justify-content: space-between; font-size: 0.85rem; margin-bottom: 0.5rem; }
.progress-card__header strong { color: var(--blue); font-size: 1.1rem; }
.progress-card__sub { font-size: 0.78rem; color: var(--muted); margin-top: 0.35rem; }
.progress-bar { height: 8px; background: rgba(255,255,255,.6); border-radius: 999px; overflow: hidden; }
.progress-bar__fill { height: 100%; background: linear-gradient(90deg, var(--blue), var(--teal)); border-radius: 999px; transition: width .5s; }

.phase-nav { display: flex; flex-direction: column; gap: 0.35rem; }
.phase-nav__item {
  padding: 0.65rem 0.75rem; border-radius: 8px; cursor: pointer; font-size: 0.84rem;
  border: 1px solid transparent; background: transparent; text-align: left; width: 100%;
  font: inherit; color: var(--dark);
}
.phase-nav__item:hover { background: var(--bg); }
.phase-nav__item--active { background: #e8f4fd; border-color: #bfdbfe; }
.phase-nav__meta { display: block; font-size: 0.72rem; color: var(--muted); margin-top: 0.15rem; }

.sidebar-cta { margin-top: 1.25rem; padding: 1rem; background: #e6f7f5; border-radius: 10px; font-size: 0.85rem; }
.sidebar-cta p { margin-bottom: 0.75rem; }

/* Views */
.portal-view { display: none; }
.portal-view--active { display: block; }

.welcome-banner {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 1.75rem; display: flex; justify-content: space-between; align-items: center;
  gap: 1.5rem; margin-bottom: 1.5rem; flex-wrap: wrap;
}
.welcome-banner h1 { font-family: var(--display); font-size: 1.5rem; }
.welcome-banner p { color: var(--muted); margin-top: 0.35rem; }

.phase-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.phase-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 1.25rem; cursor: pointer; transition: box-shadow .2s, border-color .2s;
}
.phase-card:hover { border-color: var(--blue); box-shadow: 0 4px 20px rgba(0,102,179,.08); }
.phase-card h3 { font-size: 0.95rem; margin-bottom: 0.35rem; }
.phase-card__progress { font-size: 0.78rem; color: var(--muted); margin-bottom: 0.75rem; }
.phase-card__bar { height: 4px; background: var(--border); border-radius: 999px; overflow: hidden; }
.phase-card__fill { height: 100%; background: var(--teal); border-radius: 999px; }

.lesson-list { margin-top: 0.75rem; }
.lesson-list__item {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 0;
  font-size: 0.82rem; border-top: 1px solid var(--border); cursor: pointer;
}
.lesson-list__item:hover { color: var(--blue); }
.lesson-list__item--done { color: var(--teal); }
.lesson-list__check { width: 16px; height: 16px; flex-shrink: 0; }

/* Lesson player */
.back-btn { background: none; border: none; color: var(--muted); font: inherit; cursor: pointer; margin-bottom: 1rem; }
.back-btn:hover { color: var(--blue); }

.lesson-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 1.5rem; }
.vimeo-player { aspect-ratio: 16/9; background: #000; border-radius: 12px; overflow: hidden; }
.vimeo-player iframe { width: 100%; height: 100%; border: 0; }
.no-video-msg { aspect-ratio: 16/9; background: #1e293b; border-radius: 12px; display: grid; place-items: center; color: #94a3b8; padding: 2rem; text-align: center; }

.lesson-phase { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--blue); }
.lesson-info h1 { font-family: var(--display); font-size: 1.35rem; margin: 0.35rem 0 0.75rem; }
.lesson-info p { color: var(--muted); font-size: 0.92rem; line-height: 1.6; }
.lesson-actions { display: flex; gap: 0.75rem; margin-top: 1.5rem; flex-wrap: wrap; }
.lesson-nav-mini { margin-top: 1rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.65rem 1.1rem; border-radius: 8px; border: 1px solid transparent;
  font: inherit; font-weight: 600; font-size: 0.88rem; cursor: pointer; text-decoration: none;
}
.btn--primary { background: var(--blue); color: #fff; }
.btn--outline { background: #fff; border-color: var(--border); color: var(--dark); }
.btn--ghost { background: transparent; color: var(--muted); border: none; }
.btn--lg { padding: 0.8rem 1.4rem; font-size: 0.95rem; }
.btn--sm { padding: 0.45rem 0.75rem; font-size: 0.8rem; }
.btn--block { width: 100%; }

.toast {
  position: fixed; bottom: 1.5rem; right: 1.5rem; background: var(--dark); color: #fff;
  padding: 0.85rem 1.1rem; border-radius: 10px; z-index: 200;
}

@media (max-width: 900px) {
  .login-wrap { grid-template-columns: 1fr; }
  .login-brand { text-align: center; }
  .portal-body { flex-direction: column; }
  .portal-sidebar { width: 100%; position: static; height: auto; }
  .lesson-layout { grid-template-columns: 1fr; }
}