/* ---------------------------------------------------------------
   Maten Health — design layer on top of Bootstrap 5.3 colour modes.
   Tokens are defined for light, then overridden for [data-bs-theme=dark].
   --------------------------------------------------------------- */
:root {
  --mh-ink:        #0d1b2a;
  --mh-brand:      #1f6feb;
  --mh-brand-2:    #0ea5a4;
  --mh-surface:    #ffffff;
  --mh-surface-2:  #f6f8fb;
  --mh-border:     #e3e8ef;
  --mh-muted:      #5b6b7f;
  --mh-shadow:     0 1px 2px rgba(13,27,42,.06), 0 8px 24px rgba(13,27,42,.06);
  --mh-shadow-lg:  0 2px 4px rgba(13,27,42,.06), 0 18px 48px rgba(13,27,42,.12);
  --mh-radius:     14px;

  --bs-body-font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --bs-primary: var(--mh-brand);
  --bs-link-color: var(--mh-brand);
  --bs-body-color: #17222f;
  --bs-body-bg: var(--mh-surface-2);
}

[data-bs-theme="dark"] {
  --mh-ink:        #e7eef7;
  --mh-brand:      #5b9dff;
  --mh-brand-2:    #2dd4bf;
  --mh-surface:    #131a24;
  --mh-surface-2:  #0d131b;
  --mh-border:     #253143;
  --mh-muted:      #9bacc2;
  --mh-shadow:     0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  --mh-shadow-lg:  0 2px 4px rgba(0,0,0,.4), 0 18px 48px rgba(0,0,0,.5);
  --bs-body-color: #dce6f2;
  --bs-body-bg: var(--mh-surface-2);
  --bs-link-color: var(--mh-brand);
}

body { background: var(--bs-body-bg); }
.text-body-secondary { color: var(--mh-muted) !important; }

/* ---------- chrome ---------- */
.site-nav {
  background: color-mix(in srgb, var(--mh-surface) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--mh-border);
}
.brand-mark {
  display: inline-grid; place-items: center;
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--mh-brand), var(--mh-brand-2));
  color: #fff; font-size: 1.05rem;
}
.brand-mark-sm { width: 26px; height: 26px; font-size: .85rem; border-radius: 8px; }
.brand-text { font-weight: 700; letter-spacing: -.01em; color: var(--mh-ink); }
.navbar-nav .nav-link { font-weight: 500; color: var(--mh-muted); }
.navbar-nav .nav-link.active,
.navbar-nav .nav-link:hover { color: var(--mh-brand); }

.btn-ghost {
  border: 1px solid var(--mh-border);
  background: var(--mh-surface);
  color: var(--bs-body-color);
}
.btn-ghost:hover { background: var(--mh-surface-2); color: var(--mh-brand); }

.avatar {
  display: inline-grid; place-items: center;
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--mh-brand), var(--mh-brand-2));
  color: #fff; font-size: .72rem; font-weight: 700; letter-spacing: .02em;
}

.site-footer { background: var(--mh-surface); border-top: 1px solid var(--mh-border); }

/* ---------- surfaces ---------- */
.card, .panel {
  background: var(--mh-surface);
  border: 1px solid var(--mh-border);
  border-radius: var(--mh-radius);
  box-shadow: var(--mh-shadow);
}
.panel { padding: 1.25rem; }
.panel-tight { padding: 1rem; }

/* ---------- hero ---------- */
.hero {
  background:
    radial-gradient(1100px 460px at 12% -10%, rgba(31,111,235,.20), transparent 60%),
    radial-gradient(900px 420px at 88% 0%, rgba(14,165,164,.18), transparent 60%),
    var(--mh-ink);
  color: #eaf2ff;
  border-bottom: 1px solid var(--mh-border);
}
[data-bs-theme="light"] .hero { --mh-ink: #0d1b2a; }
.hero .lead { color: #b9cbe4; }
.hero-stat { border-left: 2px solid rgba(255,255,255,.18); padding-left: 1rem; }
.hero-stat .n { font-size: 1.6rem; font-weight: 700; line-height: 1; color: #fff; }
.hero-stat .l { font-size: .78rem; color: #9fb6d4; text-transform: uppercase; letter-spacing: .06em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .74rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  padding: .3rem .7rem; border-radius: 999px;
  background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.16); color: #cfe0f7;
}

/* ---------- course cards ---------- */
.course-card {
  display: flex; flex-direction: column; height: 100%;
  border-radius: var(--mh-radius); overflow: hidden;
  background: var(--mh-surface); border: 1px solid var(--mh-border);
  box-shadow: var(--mh-shadow);
  transition: transform .15s ease, box-shadow .15s ease;
}
.course-card:hover { transform: translateY(-3px); box-shadow: var(--mh-shadow-lg); }
.course-card .accent-bar { height: 4px; background: var(--accent, var(--mh-brand)); }
.course-emoji {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  font-size: 1.4rem;
  background: color-mix(in srgb, var(--accent, var(--mh-brand)) 14%, transparent);
}
.chip {
  display: inline-block; font-size: .74rem; font-weight: 600;
  padding: .22rem .6rem; border-radius: 999px;
  background: var(--mh-surface-2); border: 1px solid var(--mh-border); color: var(--mh-muted);
}
.chip-accent {
  background: color-mix(in srgb, var(--accent, var(--mh-brand)) 14%, transparent);
  border-color: color-mix(in srgb, var(--accent, var(--mh-brand)) 30%, transparent);
  color: var(--accent, var(--mh-brand));
}

/* ---------- quiz ---------- */
.option-btn {
  display: flex; gap: .8rem; width: 100%; text-align: left;
  padding: .85rem 1rem; margin-bottom: .6rem;
  border: 1.5px solid var(--mh-border); border-radius: 12px;
  background: var(--mh-surface); color: var(--bs-body-color);
  transition: border-color .12s ease, background .12s ease;
}
.option-btn:hover:not(:disabled) { border-color: var(--mh-brand); background: var(--mh-surface-2); }
.option-btn .letter {
  flex: 0 0 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  background: var(--mh-surface-2); border: 1px solid var(--mh-border);
  font-weight: 700; font-size: .8rem;
}
.option-btn.selected { border-color: var(--mh-brand); background: color-mix(in srgb, var(--mh-brand) 8%, transparent); }
.option-btn.selected .letter { background: var(--mh-brand); border-color: var(--mh-brand); color: #fff; }
.option-btn.correct { border-color: #16a34a; background: color-mix(in srgb, #16a34a 10%, transparent); }
.option-btn.correct .letter { background: #16a34a; border-color: #16a34a; color: #fff; }
.option-btn.wrong { border-color: #dc2626; background: color-mix(in srgb, #dc2626 10%, transparent); }
.option-btn.wrong .letter { background: #dc2626; border-color: #dc2626; color: #fff; }
.option-btn:disabled { opacity: 1; cursor: default; }

.q-progress { height: 6px; border-radius: 999px; background: var(--mh-border); overflow: hidden; }
.q-progress > span { display: block; height: 100%; background: linear-gradient(90deg, var(--mh-brand), var(--mh-brand-2)); transition: width .2s ease; }

.q-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: .35rem; }
.q-dot {
  aspect-ratio: 1; border-radius: 8px; border: 1px solid var(--mh-border);
  background: var(--mh-surface); font-size: .75rem; font-weight: 600;
  display: grid; place-items: center; color: var(--mh-muted);
}
.q-dot.answered { background: color-mix(in srgb, var(--mh-brand) 16%, transparent); border-color: var(--mh-brand); color: var(--mh-brand); }
.q-dot.correct  { background: color-mix(in srgb, #16a34a 18%, transparent); border-color: #16a34a; color: #16a34a; }
.q-dot.wrong    { background: color-mix(in srgb, #dc2626 18%, transparent); border-color: #dc2626; color: #dc2626; }
.q-dot.current  { outline: 2px solid var(--mh-brand); outline-offset: 1px; }

/* ---------- AI panel ---------- */
.ai-panel { border: 1px dashed var(--mh-border); border-radius: 12px; background: var(--mh-surface-2); }
.ai-text { white-space: pre-wrap; line-height: 1.65; }
.ai-text strong { color: var(--mh-ink); }
.ai-bubble { border-radius: 12px; padding: .6rem .85rem; margin-bottom: .5rem; max-width: 92%; }
.ai-bubble.user { margin-left: auto; background: color-mix(in srgb, var(--mh-brand) 12%, transparent); }
.ai-bubble.model { background: var(--mh-surface); border: 1px solid var(--mh-border); }
.ai-log { max-height: 340px; overflow-y: auto; }

/* ---------- score ring ---------- */
.score-ring {
  --pct: 0;
  width: 132px; height: 132px; border-radius: 50%;
  background: conic-gradient(var(--ring, var(--mh-brand)) calc(var(--pct) * 1%), var(--mh-border) 0);
  display: grid; place-items: center;
}
.score-ring > div {
  width: 104px; height: 104px; border-radius: 50%; background: var(--mh-surface);
  display: grid; place-items: center; line-height: 1.1;
}
.score-ring .pct { font-size: 1.9rem; font-weight: 700; }

.stat-tile { background: var(--mh-surface-2); border: 1px solid var(--mh-border); border-radius: 12px; padding: .9rem 1rem; }
.stat-tile .n { font-size: 1.45rem; font-weight: 700; line-height: 1.1; }
.stat-tile .l { font-size: .76rem; text-transform: uppercase; letter-spacing: .05em; color: var(--mh-muted); }

.form-control, .form-select { border-color: var(--mh-border); }
.form-control:focus, .form-select:focus {
  border-color: var(--mh-brand);
  box-shadow: 0 0 0 .2rem color-mix(in srgb, var(--mh-brand) 20%, transparent);
}
.sticky-side { position: sticky; top: 84px; }
@media (max-width: 991.98px) { .sticky-side { position: static; } }