/* Radiology Sindbad — dark + gold theme */

:root {
  --rs-bg:        #0d0d0f;
  --rs-panel:     #16161a;
  --rs-panel-2:   #1c1c22;
  --rs-border:    #26262c;
  --rs-muted:     #2f2f36;

  --rs-gold:      #d4af37;
  --rs-gold-hi:   #e5c158;
  --rs-gold-soft: #f0d87c;

  --rs-text:      #e8e8ea;
  --rs-text-mute: #9a9aa2;
  --rs-danger:    #e06c6c;
  --rs-success:   #6cc7a3;

  --rs-radius:    10px;
  --rs-shadow:    0 2px 20px rgba(0,0,0,.35);
}

/* Bootstrap variable overrides */
[data-bs-theme="dark"] {
  --bs-body-bg: var(--rs-bg);
  --bs-body-color: var(--rs-text);
  --bs-border-color: var(--rs-border);
  --bs-primary: var(--rs-gold);
  --bs-primary-rgb: 212, 175, 55;
  --bs-link-color: var(--rs-gold);
  --bs-link-hover-color: var(--rs-gold-hi);
  --bs-emphasis-color: var(--rs-gold-soft);
}

html, body {
  background: var(--rs-bg);
  color: var(--rs-text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Nav */
.rs-navbar {
  background: rgba(22,22,26,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rs-border);
  padding: 0.75rem 0;
}
.rs-navbar .navbar-brand {
  color: var(--rs-gold);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.rs-navbar .navbar-brand:hover { color: var(--rs-gold-hi); }
.rs-navbar .nav-link { color: var(--rs-text-mute); font-weight: 500; }
.rs-navbar .nav-link:hover { color: var(--rs-gold-soft); }
.rs-navbar .nav-link.active { color: var(--rs-gold); }

/* Brand logo */
.rs-logo {
  display: inline-block;
  object-fit: contain;
  filter: drop-shadow(0 0 6px rgba(212,175,55,0.18));
}
.rs-logo-nav { height: 40px; width: auto; }
.rs-logo-sm  { height: 28px; width: auto; }
.rs-logo-lg  { height: 160px; width: auto; margin-bottom: 1.5rem; }

/* Legacy gold-dot glyph (kept for future badge-style use) */
.rs-logo-dot {
  display: inline-block;
  width: 10px; height: 10px;
  background: var(--rs-gold);
  border-radius: 50%;
  margin-right: 0.5rem;
  box-shadow: 0 0 8px var(--rs-gold);
  vertical-align: middle;
}

/* Panels */
.rs-card {
  background: var(--rs-panel);
  border: 1px solid var(--rs-border);
  border-radius: var(--rs-radius);
  box-shadow: var(--rs-shadow);
  padding: 1.25rem;
}
.rs-card h1, .rs-card h2, .rs-card h3 { color: var(--rs-gold-soft); }

/* Buttons */
.btn-gold {
  background: var(--rs-gold);
  color: #141416;
  border: 1px solid var(--rs-gold);
  font-weight: 600;
}
.btn-gold:hover { background: var(--rs-gold-hi); border-color: var(--rs-gold-hi); color: #0d0d0f; }
.btn-outline-gold {
  background: transparent;
  color: var(--rs-gold);
  border: 1px solid var(--rs-gold);
  font-weight: 600;
}
.btn-outline-gold:hover { background: var(--rs-gold); color: #0d0d0f; }

/* Forms */
.form-control, .form-select {
  background: var(--rs-panel-2);
  color: var(--rs-text);
  border: 1px solid var(--rs-border);
}
.form-control:focus, .form-select:focus {
  background: var(--rs-panel-2);
  color: var(--rs-text);
  border-color: var(--rs-gold);
  box-shadow: 0 0 0 0.2rem rgba(212,175,55,0.2);
}

/* Hero */
.rs-hero {
  padding: 6rem 0 4rem;
  text-align: center;
}
.rs-hero h1 {
  font-size: clamp(1.25rem, 2.8vw, 1.85rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
  font-style: italic;
  background: linear-gradient(180deg, var(--rs-gold-soft) 0%, var(--rs-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}
.rs-hero p.lead {
  color: var(--rs-text-mute);
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto 2rem;
}

/* Stat tiles */
.rs-stat {
  background: var(--rs-panel);
  border: 1px solid var(--rs-border);
  border-radius: var(--rs-radius);
  padding: 1rem 1.25rem;
}
.rs-stat .rs-stat-num { color: var(--rs-gold); font-size: 2rem; font-weight: 700; line-height: 1; }
.rs-stat .rs-stat-label { color: var(--rs-text-mute); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; }

/* Studio layout */
.rs-studio { display: flex; min-height: calc(100vh - 72px); }
.rs-studio-sidebar {
  width: 240px;
  background: var(--rs-panel);
  border-right: 1px solid var(--rs-border);
  padding: 1.5rem 1rem;
  flex-shrink: 0;
}
.rs-studio-sidebar h6 {
  color: var(--rs-text-mute);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}
.rs-studio-sidebar h6:first-child { margin-top: 0; }
.rs-studio-sidebar a {
  display: block;
  color: var(--rs-text);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.95rem;
}
.rs-studio-sidebar a:hover { background: var(--rs-panel-2); color: var(--rs-gold-soft); }
.rs-studio-sidebar a.active { background: var(--rs-muted); color: var(--rs-gold); }
.rs-studio-main { flex: 1; padding: 2rem; overflow-x: auto; min-width: 0; }
.rs-studio-main h1 { color: var(--rs-gold-soft); margin-bottom: 1.5rem; }

/* Mobile Studio: sidebar stacks above content, full-width, compact. */
.rs-studio-menu-toggle { display: none; }  /* toggle no longer used */

@media (max-width: 860px) {
  .rs-studio { flex-direction: column; min-height: auto; }
  .rs-studio-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--rs-border);
    padding: 0.75rem 1rem;
  }
  .rs-studio-sidebar h6 {
    display: inline-block;
    margin: 0.5rem 0.75rem 0.25rem 0;
  }
  .rs-studio-sidebar h6:first-child { margin-top: 0; }
  .rs-studio-sidebar a {
    display: inline-block;
    padding: 0.4rem 0.75rem;
    margin: 0.15rem;
    font-size: 0.9rem;
  }
  .rs-studio-main { padding: 1rem; }
  .rs-studio-main h1 { font-size: 1.35rem; margin-bottom: 1rem; }
}

/* Study-tools accordion (under a lesson's video) */
.rs-study-accordion { margin-top: 1.5rem; }

.rs-study-accordion .accordion-item {
  background: var(--rs-panel);
  border: 1px solid var(--rs-border);
  border-radius: 8px !important;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.rs-study-accordion .accordion-button {
  background: transparent;
  color: var(--rs-text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.8rem 1rem;
  box-shadow: none;
  border: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: background 0.15s, color 0.15s;
}

.rs-study-accordion .accordion-button:hover {
  background: var(--rs-panel-2);
  color: var(--rs-gold-soft);
}

.rs-study-accordion .accordion-button:not(.collapsed) {
  background: var(--rs-panel-2);
  color: var(--rs-gold);
  box-shadow: inset 0 -1px 0 var(--rs-border);
}

.rs-study-accordion .accordion-button:focus-visible {
  box-shadow: 0 0 0 2px var(--rs-gold) inset;
  outline: none;
}

.rs-study-accordion .accordion-button::after {
  width: 0.9rem;
  height: 0.9rem;
  background-size: 0.9rem;
  /* chevron becomes gold when the item is open */
  filter: brightness(0) saturate(100%) invert(72%) sepia(49%) saturate(578%) hue-rotate(8deg) brightness(91%) contrast(90%);
  opacity: 0.7;
}
.rs-study-accordion .accordion-button:not(.collapsed)::after { opacity: 1; }

.rs-study-accordion .rs-acc-label {
  flex: 1;
}

.rs-study-accordion .accordion-body {
  background: var(--rs-panel);
  color: var(--rs-text);
  padding: 1.1rem 1rem 1.25rem;
  border-top: 1px solid var(--rs-border);
}

.rs-study-accordion .ov-icon {
  display: inline-block;
  width: 1.1rem;
  text-align: center;
  line-height: 1;
}

/* Rich-text summary body — brighter, more readable */
.rs-richtext {
  color: var(--rs-text);
  line-height: 1.75;
  font-size: 1rem;
}
.rs-richtext h4 {
  color: var(--rs-gold);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 1rem 0 0.5rem;
}
.rs-richtext ul { padding-inline-start: 1.3rem; margin-bottom: 0.5rem; }
.rs-richtext li { margin-bottom: 0.4rem; }
/* When dir resolves to rtl, right-align text for a cleaner read */
.rs-richtext:dir(rtl) { text-align: right; }
.rs-richtext:dir(rtl) ul { padding-inline-start: 1.3rem; padding-inline-end: 0; }
.rs-richtext p { margin-bottom: 0.75rem; }
.rs-richtext .admin-note { color: var(--rs-text-mute); font-size: 0.85rem; margin-top: 1rem; border-top: 1px dashed var(--rs-border); padding-top: 0.75rem; }

/* Course / module cover images */
.rs-course-hero {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--rs-border);
  margin-bottom: 1.25rem;
  background: var(--rs-panel);
}
.rs-course-hero img {
  display: block;
  width: 100%;
  height: 260px;
  object-fit: cover;
}
@media (max-width: 860px) {
  .rs-course-hero img { height: 180px; }
}

.rs-card-thumb {
  display: block;
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--rs-border);
  background: var(--rs-panel-2);
}
.rs-card-thumb-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: 700;
  color: var(--rs-gold);
  background: linear-gradient(135deg, var(--rs-panel-2) 0%, var(--rs-muted) 100%);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* Preview lesson badge + lock icon in sidebar */
.rs-preview-badge {
  background: var(--rs-gold);
  color: #0d0d0f;
  font-size: 0.6rem;
  padding: 0.08rem 0.4rem;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-left: auto;
  flex: 0 0 auto;
}
.rs-lock {
  color: var(--rs-text-mute);
  font-size: 0.75rem;
  margin-left: auto;
  flex: 0 0 auto;
  opacity: 0.6;
}
.rs-lesson-nav a.locked { opacity: 0.65; }
.rs-lesson-nav a.locked:hover { opacity: 0.9; }

/* Enroll banner above the preview player */
.rs-enroll-banner {
  background: linear-gradient(to right, rgba(212,175,55,0.14), rgba(212,175,55,0.04));
  border: 1px solid var(--rs-gold);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  color: var(--rs-gold-soft);
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Enrollment bar (course page header) */
.rs-enroll-bar {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.75rem 0 0.25rem;
  flex-wrap: wrap;
}
.rs-price-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.7rem;
  background: var(--rs-panel);
  border: 1px solid var(--rs-gold);
  border-radius: 999px;
  color: var(--rs-gold);
  font-weight: 600;
  font-size: 0.85rem;
}

/* Ratings — course page + picker */
.rs-rating-bar {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.55rem 0.85rem;
  background: var(--rs-panel);
  border: 1px solid var(--rs-border);
  border-radius: 10px;
  margin: 0.75rem 0 0.5rem;
  flex-wrap: wrap;
}
.rs-rating-aggregate { display: flex; align-items: center; gap: 0.35rem; }
.rs-rating-aggregate .rs-score {
  color: var(--rs-gold);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.rs-rating-aggregate .rs-meta { color: var(--rs-text-mute); font-size: 0.78rem; }

/* Single gold star used to label a numeric rating (aggregate or per-review). */
.rs-score-star {
  color: var(--rs-gold);
  text-shadow: 0 0 6px rgba(212, 175, 55, 0.5);
  font-size: 1.05rem;
  line-height: 1;
}
.rs-score-star.sm { font-size: 0.9rem; }
.rs-rating-divider { width: 1px; height: 20px; background: var(--rs-border); }

.rs-rating-your {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  flex: 1;
}
.rs-rating-your .rs-label {
  color: var(--rs-text-mute);
  font-size: 0.85rem;
}

/* Display stars (read-only rows) */
.rs-star-row { display: inline-flex; gap: 2px; }
.rs-star-row .rs-star {
  color: #4a4a52;           /* lighter than --rs-muted so empty stars are actually visible */
  font-size: 1.05rem;
  line-height: 1;
}
.rs-star-row .rs-star.filled {
  color: var(--rs-gold);
  text-shadow: 0 0 6px rgba(212, 175, 55, 0.45);
}
.rs-star-row-lg .rs-star { font-size: 1.5rem; }

/* Interactive picker */
.rs-star-picker {
  display: inline-flex;
  gap: 0.05rem;
}
.rs-star-btn {
  background: transparent;
  border: none;
  color: #4a4a52;
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  transition: color 0.12s, transform 0.1s, text-shadow 0.15s;
}
.rs-star-btn:hover { transform: scale(1.1); }
.rs-star-btn.on {
  color: var(--rs-gold);
  text-shadow: 0 0 6px rgba(212, 175, 55, 0.5);
}
.rs-rating-expand {
  color: var(--rs-text-mute);
  font-size: 0.72rem;
  cursor: pointer;
  background: transparent;
  border: 0;
  padding: 0.05rem 0.25rem;
}
.rs-rating-expand:hover { color: var(--rs-gold-soft); }
.rs-rating-your .rs-label { font-size: 0.75rem; }
.rs-rating-your .btn-sm { font-size: 0.72rem; padding: 0.15rem 0.55rem; }

/* Timestamp "jump to this moment" button — used in flashcards, MCQs, key points */
.rs-ts-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: transparent;
  color: var(--rs-gold);
  border: 1px solid var(--rs-gold);
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  white-space: nowrap;
  flex: 0 0 auto;
}
.rs-ts-btn:hover { background: var(--rs-gold); color: #0d0d0f; }
.rs-ts-btn:focus-visible { outline: 2px solid var(--rs-gold-soft); outline-offset: 1px; }
.rs-richtext .rs-ts-btn { margin-inline-start: 0.4rem; }

/* Footer */
.rs-footer {
  border-top: 1px solid var(--rs-border);
  padding: 2rem 0;
  color: var(--rs-text-mute);
  margin-top: 4rem;
}
.rs-footer a { color: var(--rs-text-mute); text-decoration: none; }
.rs-footer a:hover { color: var(--rs-gold); }