/* ───────────────────────────────────────────────
   COURSES PAGE STYLES
─────────────────────────────────────────────── */

.courses-hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 70px 0 55px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.courses-hero::before {
    content: '';
    position: absolute;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(246,166,35,0.12) 0%, transparent 70%);
    top: -150px; right: -100px;
    border-radius: 50%;
}
.courses-hero::after {
    content: '';
    position: absolute;
    width: 350px; height: 350px;
    background: radial-gradient(circle, rgba(15,52,96,0.4) 0%, transparent 70%);
    bottom: -100px; left: -80px;
    border-radius: 50%;
}
.courses-hero h1 { color: #fff; font-size: 42px; font-weight: 800; margin-bottom: 14px; position: relative; z-index: 2; }
.courses-hero h1 span { color: #f6a623; }
.courses-hero p { color: rgba(255,255,255,0.7); font-size: 16px; max-width: 520px; margin: 0 auto; line-height: 1.7; position: relative; z-index: 2; }

.courses-section { background: #f7f9fc; padding: 60px 0 80px; }

.courses-filter-bar { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 48px; }
.filter-tab {
    background: #fff; border: 2px solid #e0e0e0; color: #555;
    padding: 9px 22px; border-radius: 50px; font-size: 13px;
    font-weight: 600; cursor: pointer; transition: all 0.25s ease; outline: none;
}
.filter-tab:hover, .filter-tab.active { background: #0f3460; border-color: #0f3460; color: #fff; }

.courses-empty { text-align: center; padding: 60px 20px; color: #888; }
.courses-empty i { font-size: 54px; color: #d0d0d0; margin-bottom: 18px; display: block; }
.courses-empty p { font-size: 16px; }

.courses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 28px; }

.course-card {
    background: #fff; border-radius: 18px; overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.07);
    transition: transform 0.28s ease, box-shadow 0.28s ease;
    display: flex; flex-direction: column; cursor: pointer;
}
.course-card:hover { transform: translateY(-8px); box-shadow: 0 16px 45px rgba(0,0,0,0.14); }

.course-card-img {
    height: 170px;
    background: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
    position: relative; overflow: hidden; display: flex; align-items: flex-end;
}
.course-card-img img { width: 100%; height: 100%; object-fit: cover; position: absolute; top: 0; left: 0; transition: transform 0.4s ease; }
.course-card:hover .course-card-img img { transform: scale(1.06); }
.course-card-img-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 60%); }
.course-card-category-badge {
    position: absolute; top: 14px; left: 14px;
    background: rgba(246,166,35,0.95); color: #fff;
    font-size: 10px; font-weight: 700; letter-spacing: 1px;
    text-transform: uppercase; padding: 4px 12px; border-radius: 50px; z-index: 2;
}
.course-card-default-icon { position: relative; z-index: 2; width: 100%; text-align: center; padding-bottom: 30px; }
.course-card-default-icon i { font-size: 54px; color: rgba(255,255,255,0.25); }

.course-card-body { padding: 22px 24px; flex: 1; display: flex; flex-direction: column; }
.course-card-title { font-size: 17px; font-weight: 800; color: #1a1a2e; margin: 0 0 10px; line-height: 1.4; }
.course-card-desc {
    font-size: 13.5px; color: #666; line-height: 1.65; margin: 0 0 18px; flex: 1;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

.course-card-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.course-card-meta span {
    background: #f0f4ff;
    color: #0f3460;
    font-size: 11.5px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.course-card-meta .fee-chip {
    background: #fff3e0;
    color: #e65100;
    border: 1px solid rgba(230,81,0,0.2);
}
.course-card-meta .fee-chip.free {
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid rgba(46,125,50,0.2);
}

.btn-learn-more {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, #0f3460, #1a1a8c);
    color: #fff; padding: 10px 22px; border-radius: 50px;
    font-size: 13px; font-weight: 700; border: none; cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    width: 100%; justify-content: center;
    box-shadow: 0 4px 14px rgba(15,52,96,0.25);
}
.btn-learn-more:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15,52,96,0.4); color: #fff; }

@media (max-width: 768px) {
    .courses-hero h1 { font-size: 30px; }
    .courses-grid { grid-template-columns: 1fr; }
}