/* Оболонка кабінету: бічне меню, об'ємні кнопки, живі картки */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  --font: "Manrope", -apple-system, "Segoe UI", Arial, sans-serif;
  --sidebar: 232px;
  --shadow-1: 0 1px 2px rgba(67,48,44,.06), 0 4px 12px rgba(67,48,44,.06);
  --shadow-2: 0 2px 4px rgba(67,48,44,.08), 0 12px 28px rgba(67,48,44,.10);
  --shadow-mag: 0 6px 16px rgba(194,24,91,.28);
}

body { font-family: var(--font); background: var(--page); }

/* ---------- каркас ---------- */
.shell { display: flex; min-height: 100vh; }

.side {
  width: var(--sidebar); flex: none; background: var(--surface);
  border-right: 1px solid var(--line); padding: 18px 14px;
  display: flex; flex-direction: column; gap: 6px;
  position: sticky; top: 0; height: 100vh;
}
.side .brand { display: flex; gap: 10px; align-items: center; padding: 4px 8px 18px; }
.side .brand h1 { font-size: 14px; margin: 0; font-weight: 800; letter-spacing: .6px; }
.side .brand h1 span { color: var(--mag); }
.side .brand .sub { font-size: 8px; letter-spacing: 3px; color: var(--ink-faint); }

.side a.nav {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border-radius: 11px; text-decoration: none;
  color: var(--choc-soft); font-size: 14px; font-weight: 600;
  transition: background .15s, color .15s, transform .1s;
}
.side a.nav:hover { background: var(--surface-2); color: var(--choc); }
.side a.nav.on { background: var(--choc); color: #fff; box-shadow: var(--shadow-1); }
.side a.nav.on svg { stroke: currentColor; }
.side a.nav svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.8; }
.side .spacer { flex: 1; }
.side .me {
  border-top: 1px solid var(--line); padding-top: 14px; font-size: 12px; color: var(--choc-soft);
}
.side .me b { display: block; font-size: 13px; color: var(--choc); }
.side .me a { color: var(--ink-faint); text-decoration: none; font-size: 12px; }

.main { flex: 1; min-width: 0; }
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 16px 28px;
  background: var(--topbar); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20;
}
.topbar .title { font-size: 15px; font-weight: 700; }
.topbar .chip {
  margin-left: auto; display: flex; align-items: center; gap: 9px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 14px 6px 6px; font-size: 13px; box-shadow: var(--shadow-1);
}
.topbar .chip .av {
  width: 28px; height: 28px; border-radius: 50%; background: var(--choc); color: #fff;
  display: grid; place-items: center; font-size: 12px; font-weight: 700;
}
.topbar .chip .lay { color: var(--ink-faint); font-size: 11px; }

/* ---------- об'ємні кнопки ---------- */
.btn {
  border-radius: 12px; font-weight: 600; box-shadow: var(--shadow-1);
  transition: transform .12s ease, box-shadow .18s ease, background .15s;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn:active { transform: translateY(1px); box-shadow: var(--shadow-1); }
.btn.mag { box-shadow: var(--shadow-mag); }
.btn.mag:hover { box-shadow: 0 10px 24px rgba(194,24,91,.34); }
.btn.ghost { background: var(--surface); }
.btn.ghost:hover { border-color: var(--line-strong); }

/* ---------- картки ---------- */
.wrap { max-width: 860px; padding: 0 28px 110px; }
.card {
  border-radius: 16px; box-shadow: var(--shadow-1); border-color: var(--line);
  transition: box-shadow .2s ease, transform .15s ease;
}
.card:hover { box-shadow: var(--shadow-2); }
.card.tint { background: linear-gradient(180deg,var(--mag-soft) 0%,var(--mag-soft) 100%); border-color: var(--mag-line); }

.mod {
  border-radius: 16px; box-shadow: var(--shadow-1); border-color: var(--line); background: var(--surface);
  transition: transform .15s ease, box-shadow .2s ease;
}
.mod:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.lesson {
  border-radius: 13px; background: var(--surface); border-color: var(--line);
  transition: transform .12s ease, box-shadow .18s ease, border-color .15s;
}
.lesson:hover { transform: translateX(2px); box-shadow: var(--shadow-1); border-color: var(--line-strong); }

h2 { font-size: 23px; font-weight: 800; letter-spacing: -.3px; margin: 24px 0 8px; }

/* ---------- мобільний ---------- */
@media (max-width: 820px) {
  .shell { flex-direction: column; }
  .side {
    width: auto; height: auto; position: sticky; bottom: 0; top: auto; order: 2;
    flex-direction: row; border-right: 0; border-top: 1px solid var(--line);
    padding: 8px; gap: 2px; justify-content: space-around;
  }
  .side .brand, .side .me, .side .spacer { display: none; }
  .side a.nav { flex-direction: column; gap: 3px; font-size: 10px; padding: 8px 6px; }
  .main { order: 1; }
  .topbar { padding: 12px 16px; }
  .wrap { padding: 0 16px 40px; }
}