/* ============================================================
   COURSE ARCHIVE — World-Class Premium Design
   Glassmorphism Dark · Emerald Accent · Plus Jakarta Sans
   ============================================================ */

/* ---- Import Fonts (once, idempotent) ---- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

.course-archive {
  --ca-bg: #06080f;
  --ca-bg-2: #0a0f1e;
  --ca-card: rgba(255, 255, 255, 0.025);
  --ca-card-border: rgba(255, 255, 255, 0.06);
  --ca-card-border-hover: rgba(52, 211, 153, 0.35);
  --ca-text: #e2e8f0;
  --ca-text-dim: #94a3b8;
  --ca-text-faint: #64748b;
  --ca-emerald: #34d399;
  --ca-emerald-2: #14b8a6;
  --ca-gold: #fbbf24;
  --ca-violet: #a78bfa;
  --ca-radius: 20px;
  --ca-font: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --ca-body: 'Inter', system-ui, sans-serif;
}

.course-archive {
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(52, 211, 153, 0.08), transparent 60%),
    radial-gradient(700px 400px at 5% 10%, rgba(251, 191, 36, 0.05), transparent 55%),
    var(--ca-bg);
  color: var(--ca-text);
  font-family: var(--ca-body);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== HERO ===== */
.ca-hero {
  position: relative;
  padding: 130px 24px 90px;
  text-align: center;
  overflow: hidden;
}
.ca-hero::before {
  content: '';
  position: absolute;
  top: -25%; right: 12%;
  width: 620px; height: 620px;
  background: radial-gradient(circle, rgba(52, 211, 153, 0.12), transparent 70%);
  animation: caFloat 16s ease-in-out infinite alternate;
  pointer-events: none;
}
.ca-hero::after {
  content: '';
  position: absolute;
  bottom: -30%; left: 8%;
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(251, 191, 36, 0.07), transparent 70%);
  animation: caFloat 20s ease-in-out infinite alternate-reverse;
  pointer-events: none;
}
@keyframes caFloat {
  0% { transform: translate(0,0) scale(1); }
  100% { transform: translate(30px, -24px) scale(1.1); }
}
.ca-hero__inner { position: relative; z-index: 2; max-width: 880px; margin: 0 auto; }
.ca-hero__badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 20px; margin-bottom: 26px;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.22);
  border-radius: 100px;
  font: 600 13px var(--ca-body); color: var(--ca-emerald);
  backdrop-filter: blur(8px);
}
.ca-hero__badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--ca-emerald);
  animation: caPulse 2s ease-in-out infinite;
}
@keyframes caPulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .4; transform: scale(1.5); } }
.ca-hero__title {
  font: 800 clamp(38px, 6vw, 66px) var(--ca-font);
  line-height: 1.06; letter-spacing: -0.04em;
  margin: 0 0 20px; color: #fff;
}
.ca-hero__title-accent {
  background: linear-gradient(135deg, #34d399 0%, #14b8a6 40%, #06b6d4 70%, #3b82f6 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.ca-hero__desc {
  font-size: 17px; line-height: 1.7; color: var(--ca-text-dim);
  max-width: 640px; margin: 0 auto 38px;
}
.ca-hero__desc strong { color: var(--ca-text); }
.ca-hero__stats { display: flex; justify-content: center; gap: 44px; flex-wrap: wrap; }
.ca-hero__stat { text-align: center; }
.ca-hero__stat-num {
  display: block; font: 800 34px var(--ca-font);
  background: linear-gradient(135deg, #fff, #94a3b8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.ca-hero__stat-label {
  font: 500 12px var(--ca-body); text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--ca-text-faint); margin-top: 3px;
}
.ca-hero__sep { width: 1px; background: rgba(255,255,255,0.08); align-self: stretch; }

/* ===== FILTER BAR ===== */
.ca-filterbar {
  position: sticky; top: 0; z-index: 30;
  background: rgba(6, 8, 15, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 14px 0;
  margin-bottom: 8px;
}
.ca-filterbar__inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.ca-filterbar__title { font: 700 13px var(--ca-body); color: var(--ca-text-faint); margin-bottom: 10px; text-transform: uppercase; letter-spacing: .08em; }
.ca-filterbar__tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.ca-tab {
  padding: 8px 16px; border-radius: 100px;
  font: 600 13.5px var(--ca-body);
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--ca-text-dim); cursor: pointer;
  transition: all .22s ease; white-space: nowrap;
}
.ca-tab:hover { color: var(--ca-text); border-color: rgba(255,255,255,0.18); }
.ca-tab.is-active {
  background: rgba(52, 211, 153, 0.14);
  border-color: rgba(52, 211, 153, 0.4);
  color: var(--ca-emerald);
}
.ca-tab__count { opacity: .6; font-size: 11px; margin-left: 5px; }

/* ===== GRID ===== */
.ca-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 36px 24px 80px;
}
@media (max-width: 960px) { .ca-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .ca-grid { grid-template-columns: 1fr; gap: 18px; padding: 28px 18px 60px; } }

/* ===== CARD ===== */
.ca-card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--ca-card);
  border: 1px solid var(--ca-card-border);
  border-radius: var(--ca-radius);
  overflow: hidden;
  text-decoration: none; color: inherit;
  transition: transform .35s cubic-bezier(.4,0,.2,1), border-color .35s, box-shadow .35s;
  animation: caCardIn .5s ease-out backwards;
}
@keyframes caCardIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
.ca-card:hover {
  transform: translateY(-6px);
  border-color: var(--ca-card-border-hover);
  box-shadow: 0 22px 44px rgba(0,0,0,0.4);
}
.ca-card__glow {
  position: absolute; inset: 0;
  background: radial-gradient(400px 200px at 50% 0%, rgba(52,211,153,0.08), transparent 70%);
  opacity: 0; transition: opacity .35s;
}
.ca-card:hover .ca-card__glow { opacity: 1; }

.ca-card__head { padding: 24px 22px 16px; position: relative; }
.ca-card__group {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 11px; border-radius: 8px;
  font: 600 11px var(--ca-body);
  background: rgba(52, 211, 153, 0.1);
  color: var(--ca-emerald);
  border: 1px solid rgba(52, 211, 153, 0.16);
  margin-bottom: 14px;
}
.ca-card__title {
  font: 700 17px var(--ca-font); line-height: 1.35;
  color: #f1f5f9; margin: 0 0 8px;
  transition: color .2s;
}
.ca-card:hover .ca-card__title { color: #fff; }
.ca-card__price {
  font: 700 15px var(--ca-body); color: var(--ca-emerald);
}
.ca-card__price--free { color: var(--ca-emerald); }
.ca-card__price--paid { color: var(--ca-gold); }

.ca-card__body { padding: 0 22px 18px; flex: 1; display: flex; flex-direction: column; }
.ca-card__desc { font-size: 13.5px; line-height: 1.65; color: var(--ca-text-dim); margin: 0 0 16px; flex: 1; }
.ca-card__meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.ca-card__meta-item {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; color: var(--ca-text-faint);
  padding: 4px 10px; border-radius: 8px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
}

.ca-card__footer { padding: 0 22px 22px; }
.ca-card__btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 12px;
  border-radius: 12px;
  font: 600 14px var(--ca-body);
  text-decoration: none; transition: all .25s ease;
}
.ca-card__btn--emerald { background: rgba(52,211,153,0.12); border: 1px solid rgba(52,211,153,0.25); color: var(--ca-emerald); }
.ca-card__btn--emerald:hover { background: rgba(52,211,153,0.22); border-color: rgba(52,211,153,0.45); transform: translateY(-1px); }
.ca-card__btn--gold { background: rgba(251,191,36,0.1); border: 1px solid rgba(251,191,36,0.2); color: var(--ca-gold); }
.ca-card__btn--gold:hover { background: rgba(251,191,36,0.2); border-color: rgba(251,191,36,0.4); transform: translateY(-1px); }

/* ===== EMPTY ===== */
.ca-empty { text-align: center; padding: 80px 24px; color: var(--ca-text-faint); }
.ca-empty h3 { font: 700 20px var(--ca-font); color: var(--ca-text-dim); margin-bottom: 8px; }

/* ===== PAGINATION ===== */
.ca-pagination { display: flex; justify-content: center; gap: 8px; padding: 0 24px 90px; flex-wrap: wrap; }
.ca-pagination a, .ca-pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 42px; height: 42px; padding: 0 14px;
  border-radius: 12px; font: 600 14px var(--ca-body);
  text-decoration: none; transition: all .22s ease;
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08); color: var(--ca-text-dim);
}
.ca-pagination a:hover { color: #fff; border-color: rgba(255,255,255,0.2); }
.ca-pagination .current {
  background: rgba(52,211,153,0.16); border-color: rgba(52,211,153,0.4); color: var(--ca-emerald);
}

/* ===== RESPONSIVE HERO ===== */
@media (max-width: 600px) {
  .ca-hero { padding: 96px 18px 64px; }
  .ca-hero__stats { gap: 28px; }
  .ca-hero__sep { display: none; }
  .ca-hero__stat-num { font-size: 28px; }
}