/* ==========================================================================
   KURD AI — کۆرسەکان (Courses) · academy design  ·  v2
   Indigo/blue learning-academy look, aligned with the "Futuristic Glass"
   v4 token system (--kai-brand-*, --kai-glass-*, --kai-shadow-*, easings).
   Page identity: indigo → blue → violet → cyan.
   Pure CSS — no image assets added.
   ========================================================================== */

/* ---------- page accent tokens (v4 alignment) ---------- */
:root {
    --kai-crs-a: #6366f1;    /* indigo */
    --kai-crs-b: #3b82f6;    /* blue  */
    --kai-crs-c: #8b5cf6;    /* violet */
    --kai-crs-d: #06b6d4;    /* cyan  */
}

/* ---------- shared keyframes ---------- */
@keyframes kaiFlow { to { background-position: 220% center; } }
@keyframes kaiShine { 0%, 55% { left: -80%; } 100% { left: 160%; } }
@keyframes kaiHeartPop {
    0% { transform: scale(0.6); }
    60% { transform: scale(1.35); }
    100% { transform: scale(1); }
}

/* ---------- hero ---------- */
header .inline-flex { animation: kaiPopBadge 0.7s cubic-bezier(0.22, 1, 0.36, 1) both; }
@keyframes kaiPopBadge { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }
header h2 {
    background-image: linear-gradient(90deg, var(--kai-crs-a), var(--kai-crs-b) 45%, var(--kai-crs-c) 80%, var(--kai-crs-d));
    background-size: 220% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    animation: kaiHeadIn 0.9s 0.15s cubic-bezier(0.22, 1, 0.36, 1) both, kaiFlow 8s linear infinite;
}
header p { animation: kaiHeadIn 0.9s 0.3s cubic-bezier(0.22, 1, 0.36, 1) both; }
@keyframes kaiHeadIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

/* ---------- topic filter pills ---------- */
.topic-btn { position: relative; overflow: hidden; }
.topic-btn:hover { transform: translateY(-2px); }
.topic-btn.bg-indigo-600 {
    box-shadow: 0 10px 30px -8px color-mix(in srgb, var(--kai-crs-a) 65%, transparent);
}
.topic-btn.bg-indigo-600::after {
    content: "";
    position: absolute; top: 0; bottom: 0; left: -80%;
    width: 50%;
    background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: skewX(-18deg);
    animation: kaiShine 3s ease-in-out infinite;
    pointer-events: none;
}

/* ---------- category section headers ---------- */
#courses-container .col-span-3 h2 {
    background-image: linear-gradient(90deg, var(--kai-crs-a), var(--kai-crs-c), var(--kai-crs-b));
    background-size: 220% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    animation: kaiFlow 7s linear infinite;
}

/* ---------- course cards ---------- */
.course-item { position: relative; }
.course-item::before {
    content: "";
    position: absolute;
    top: 0; right: 0; left: 0;
    height: 4px;
    z-index: 5;
    background: linear-gradient(90deg, var(--kai-crs-a), var(--kai-crs-b), var(--kai-crs-c), var(--kai-crs-d));
    background-size: 220% auto;
    animation: kaiFlow 6s linear infinite;
}
.course-item:hover {
    box-shadow: 0 26px 60px -18px color-mix(in srgb, var(--kai-crs-a) 45%, transparent);
}

/* badge glow */
.course-item .absolute[class*="bg-blue-600"],
.course-item .absolute[class*="bg-white/90"] {
    box-shadow: 0 4px 14px color-mix(in srgb, var(--kai-crs-b) 40%, transparent);
}

/* fav heart pop */
.course-item button[onclick*="toggleCourseFav"] { transition: transform 0.2s ease, background-color 0.2s ease; }
.course-item button[onclick*="toggleCourseFav"].bg-red-500 { animation: kaiHeartPop 0.45s ease; }

/* CTA shine */
.course-item a[target="_blank"] { position: relative; overflow: hidden; }
.course-item a[target="_blank"]::after {
    content: "";
    position: absolute; top: 0; bottom: 0; left: -80%;
    width: 55%;
    background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    transform: skewX(-18deg);
    animation: kaiShine 3s ease-in-out infinite;
    pointer-events: none;
}

/* see-more link arrow slide */
.course-item button.w-max { transition: gap 0.25s ease; }
.course-item:hover button.w-max svg { transform: translateY(2px); transition: transform 0.25s ease; }

/* ---------- fallbacks ---------- */
@media (prefers-reduced-motion: reduce) {
    header h2, header .inline-flex, header p,
    .topic-btn.bg-indigo-600::after, #courses-container .col-span-3 h2,
    .course-item::before, .course-item a[target="_blank"]::after,
    .course-item button[onclick*="toggleCourseFav"].bg-red-500 { animation: none !important; }
    header h2, #courses-container .col-span-3 h2 {
        background-image: none; -webkit-background-clip: border-box; background-clip: border-box;
        color: #111827; -webkit-text-fill-color: #111827;
    }
    .dark header h2, .dark #courses-container .col-span-3 h2 { color: #fff; -webkit-text-fill-color: #fff; }
}