/* screens.css — page-specific styles for auth, library, course, module, lesson, settings */

/* ────────────────────────────────────────────────────────────────── */
/*  AUTH                                                              */
/* ────────────────────────────────────────────────────────────────── */
.vs-auth {
  min-height: 100vh;
  display: grid; grid-template-columns: 1fr;
  position: relative; overflow: hidden;
  background: var(--bg-canvas);
}
.vs-auth-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 100% 0%, var(--accent-primary-soft), transparent 60%),
    radial-gradient(ellipse 60% 60% at 0% 100%, hsl(var(--accent-h) var(--accent-s) calc(var(--accent-l) + 36%) / .4), transparent 60%);
  z-index: 0;
}
.vs-auth-card {
  position: relative; z-index: 1;
  max-width: 520px; margin: 96px auto 0;
  padding: 48px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
}
.vs-auth-brand { display: flex; align-items: center; gap: 12px; }
.vs-auth-features {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
  margin-top: 32px; padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}
.vs-auth-feat { display: flex; align-items: flex-start; gap: 10px; }
.vs-auth-feat-ic {
  width: 28px; height: 28px; flex: 0 0 auto;
  border-radius: var(--r-sm); background: var(--accent-primary-soft);
  color: var(--accent-primary);
  display: inline-flex; align-items: center; justify-content: center;
}
.vs-auth-footer {
  position: relative; z-index: 1;
  display: flex; justify-content: space-between;
  max-width: 520px; margin: 24px auto 24px;
  font-size: 12px; color: var(--text-tertiary);
}

.vs-auth-splash {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.vs-auth-error-ic {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--accent-danger-soft); color: var(--accent-danger);
  display: inline-flex; align-items: center; justify-content: center;
}

/* ────────────────────────────────────────────────────────────────── */
/*  PAGE HEAD                                                         */
/* ────────────────────────────────────────────────────────────────── */
.vs-page-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px;
  padding-bottom: 24px;
}
.vs-page-head-aside { display: flex; align-items: center; gap: 12px; }
.vs-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ────────────────────────────────────────────────────────────────── */
/*  LIBRARY                                                           */
/* ────────────────────────────────────────────────────────────────── */
.vs-library { max-width: var(--content-wide); margin: 0 auto; }

.vs-lib-section { margin-top: 40px; }
.vs-lib-sect-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 16px;
}
.vs-lib-card-switch { display: flex; align-items: center; gap: 10px; }

/* Continue banner (hero) */
.vs-continue {
  display: grid; grid-template-columns: 320px 1fr;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.vs-continue-poster { background: var(--bg-surface-raised); position: relative; }
.vs-continue-poster .vs-poster-svg { width: 100%; height: 100%; display: block; }
.vs-continue-body { padding: 28px 32px; }

/* Course grid */
.vs-courses-grid { display: grid; gap: 16px; }
.vs-courses-netflix { grid-template-columns: repeat(3, 1fr); }
.vs-courses-apple   { grid-template-columns: 1fr; }
.vs-courses-linear  { grid-template-columns: repeat(3, 1fr); }

/* Generic cc */
.vs-cc {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  text-align: left; cursor: default;
  font-family: inherit; color: inherit;
  padding: 0; overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .18s cubic-bezier(.4,.2,.2,1), box-shadow .18s, border-color .15s;
}
.vs-cc:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-default);
}

/* Netflix variant */
.vs-cc-netflix .vs-cc-poster { position: relative; aspect-ratio: 2/1; overflow: hidden; }
.vs-cc-netflix .vs-poster-svg { width: 100%; height: 100%; display: block; }
.vs-cc-netflix .vs-cc-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,.55));
  display: flex; align-items: flex-end; justify-content: center;
  padding-bottom: 16px;
  opacity: 0; transition: opacity .2s;
}
.vs-cc-netflix:hover .vs-cc-overlay { opacity: 1; }
.vs-cc-netflix .vs-cc-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.95); color: var(--text-primary);
  padding: 6px 14px; border-radius: var(--r-pill);
  font-size: 12px; font-weight: 600;
}
.vs-cc-netflix .vs-cc-badge {
  position: absolute; top: 12px; right: 12px;
  display: inline-flex; align-items: center; gap: 4px;
  background: rgba(255,255,255,.9); color: var(--text-primary);
  padding: 4px 8px; border-radius: var(--r-pill);
  font-size: 11px; font-weight: 600;
}
.vs-cc-body { padding: 16px; display: flex; flex-direction: column; gap: 0; flex: 1; }
.vs-cc-netflix .vs-cc-meta {
  display: flex; gap: 12px; margin-top: 12px;
  color: var(--text-tertiary); font-size: 12px;
}
.vs-cc-netflix .vs-cc-meta span { display: inline-flex; align-items: center; gap: 4px; }
.vs-cc-netflix .vs-cc-tags {
  display: flex; gap: 6px; margin-top: 12px; flex-wrap: wrap;
}

/* Apple variant */
.vs-cc-apple {
  display: grid; grid-template-columns: 160px 1fr 48px;
  align-items: center; gap: 24px; padding: 32px;
}
.vs-cc-apple-glyph {
  width: 160px; height: 160px; flex: 0 0 auto;
  border-radius: var(--r-lg); overflow: hidden;
  background: var(--bg-surface-raised);
  display: flex; align-items: center; justify-content: center;
}
.vs-cc-apple-glyph .vs-poster-svg { width: 100%; height: 100%; }
.vs-cc-apple-body { min-width: 0; }
.vs-cc-apple-meta {
  display: flex; align-items: center; gap: 12px;
  color: var(--text-tertiary); font-size: 13px;
}
.vs-cc-dot { width: 3px; height: 3px; background: var(--text-tertiary); border-radius: 50%; }
.vs-cc-apple-arrow { color: var(--text-tertiary); justify-self: end; }

/* Linear variant */
.vs-cc-linear { padding: 20px; gap: 14px; }
.vs-cc-linear-top { display: flex; align-items: flex-start; gap: 12px; }
.vs-cc-linear-mark {
  width: 32px; height: 32px; border-radius: var(--r-sm);
  background: var(--accent-primary); color: var(--color-white);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 16px;
  flex: 0 0 auto;
}
.vs-cc-linear-meta { flex: 1; min-width: 0; }
.vs-cc-linear-desc {
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}
.vs-cc-linear-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  padding-top: 14px; border-top: 1px solid var(--border-subtle);
  gap: 4px;
}
.vs-cc-linear-grid > div { display: flex; flex-direction: column; gap: 2px; }
.vs-cc-linear-grid .t-caption { font-size: 10px; }
.vs-cc-linear-grid .t-body-strong { font-size: 14px; }

/* Placeholder card */
.vs-cc-placeholder {
  background: var(--bg-surface-raised);
  border-style: dashed; border-color: var(--border-default);
  align-items: center; justify-content: center;
  min-height: 200px; pointer-events: none;
}
.vs-cc-placeholder:hover { transform: none; box-shadow: none; }
.vs-cc-placeholder-apple { min-height: 224px; padding: 32px; }
.vs-cc-placeholder-inner {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 32px; color: var(--text-tertiary);
}
.vs-cc-placeholder-glyph {
  width: 48px; height: 48px; border-radius: var(--r-sm);
  border: 2px dashed var(--border-default);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 600; font-size: 20px;
}

/* Empty + skeleton */
.vs-empty {
  display: flex; flex-direction: column; align-items: center;
  padding: 48px 24px;
  background: var(--bg-surface); border: 1px dashed var(--border-default);
  border-radius: var(--r-lg);
  color: var(--text-secondary);
}
.vs-empty-illus {
  color: var(--accent-info); margin-bottom: 16px;
}
.vs-skeleton-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.vs-skel-card { background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--r-lg); overflow: hidden; }

/* ── Segment switch ────────────────────────────────────────────── */
.vs-seg {
  display: inline-flex; padding: 2px;
  background: var(--bg-surface-raised); border-radius: var(--r-sm);
  border: 1px solid var(--border-subtle);
}
.vs-seg-btn {
  height: 24px; padding: 0 10px; border: 0; background: transparent;
  border-radius: 4px; cursor: default;
  font-size: 12px; font-weight: 500; color: var(--text-secondary);
}
.vs-seg-btn.is-on {
  background: var(--bg-surface); color: var(--text-primary);
  box-shadow: 0 1px 2px rgba(20,20,28,.06);
}
.vs-seg-btn:hover { color: var(--text-primary); }

/* ────────────────────────────────────────────────────────────────── */
/*  COURSE                                                            */
/* ────────────────────────────────────────────────────────────────── */
.vs-course { max-width: var(--content-wide); margin: 0 auto; }

.vs-course-hero {
  display: grid; grid-template-columns: 460px 1fr;
  gap: 48px; padding: 16px 0 48px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 32px;
}
.vs-course-cover { display: flex; flex-direction: column; gap: 12px; }
.vs-cover-canvas {
  border-radius: var(--r-lg); overflow: hidden;
  border: 1px solid var(--border-subtle);
  aspect-ratio: 3/2;
}
.vs-cover-canvas svg { display: block; }
.vs-cover-switch { display: flex; align-items: center; gap: 10px; }

.vs-course-meta { padding-top: 8px; }
.vs-course-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-top: 24px;
  padding: 16px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.vs-course-stats > div { display: flex; flex-direction: column; gap: 2px; }
.vs-course-stats span {
  font-size: 22px; font-weight: 600; color: var(--text-primary);
}
.vs-course-stats label {
  font-size: 11px; color: var(--text-tertiary);
  text-transform: uppercase; letter-spacing: 0.06em;
}

/* Module card (course-page TOC) */
.vs-mod-card {
  display: grid; grid-template-columns: 32px 1fr 180px 24px;
  align-items: center; gap: 20px;
  padding: 20px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  cursor: default; text-align: left;
  color: inherit; font-family: inherit;
  transition: border-color .12s, background .12s, transform .12s;
}
.vs-mod-card:hover { border-color: var(--border-default); background: var(--bg-surface-raised); }
.vs-mod-card.is-locked { opacity: 0.55; cursor: not-allowed; }
.vs-mod-card.is-locked:hover { background: var(--bg-surface); border-color: var(--border-subtle); }
.vs-mod-chev { color: var(--text-tertiary); }

/* ────────────────────────────────────────────────────────────────── */
/*  MODULE                                                            */
/* ────────────────────────────────────────────────────────────────── */
.vs-module { max-width: var(--content-wide); margin: 0 auto; }

.vs-lesson-row {
  display: grid; grid-template-columns: 32px 1fr 80px 24px;
  align-items: center; gap: 20px;
  padding: 18px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  cursor: default; text-align: left;
  color: inherit; font-family: inherit; width: 100%;
  transition: border-color .12s, background .12s;
}
.vs-lesson-row:hover { border-color: var(--border-default); background: var(--bg-surface-raised); }
.vs-lesson-row.is-locked { opacity: 0.55; cursor: not-allowed; }
.vs-lesson-row.is-locked:hover { background: var(--bg-surface); border-color: var(--border-subtle); }
.vs-lesson-chips { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.vs-lesson-aside { text-align: right; }
.vs-lesson-chev { color: var(--text-tertiary); }

.vs-mod-nav {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 40px; padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}