/* ============================================================
   COURSES PAGE STYLES (courses.css) – Light Theme
   ============================================================ */

:root {
    --primary: #0f172a;
    --secondary: #1e293b;
    --surface: #334155;
    --accent: #d4af37;
    --accent-glow: rgba(212, 175, 55, 0.25);
    --accent2: #b8860b;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --glass-bg: rgba(0, 0, 0, 0.02);
    --glass-border: rgba(0, 0, 0, 0.08);
    --shadow: 0 25px 60px rgba(0, 0, 0, 0.08);
    --radius: 14px;
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --orange: #f57c00;
    --orange-light: #ffa726;
    --body-bg: #f8fafc;
    --card-bg: linear-gradient(135deg, #ffffff 0%, #f8fafc 50%, #ffffff 100%);
    --card-border: rgba(0, 0, 0, 0.08);
    --info-card-bg: rgba(0, 0, 0, 0.02);
    --info-card-border: rgba(0, 0, 0, 0.06);
    --audience-bg: rgba(247, 37, 133, 0.06);
    --audience-border: #f72585;
    --btn-primary-bg: linear-gradient(135deg, #d4af37, #f5d77b);
    --btn-primary-color: #0b0f19;
    --btn-secondary-border: #d4af37;
    --btn-secondary-color: #b8860b;
    --stats-panel-bg: rgba(0, 0, 0, 0.02);
    --stats-panel-border: rgba(0, 0, 0, 0.06);
    --badge-ongoing-bg: linear-gradient(115deg, #10b981 0%, #059669 100%);
    --badge-upcoming-bg: linear-gradient(115deg, #f59e0b 0%, #d97706 100%);
    --badge-offline-bg: linear-gradient(115deg, #6366f1 0%, #4f46e5 100%);
}

/* ===== BODY ===== */
body {
    background: #f8fafc;
    font-family: 'Inter', 'Hind Siliguri', 'Roboto', 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
}

.course-card-grid {
    width: 100%;
    max-width: 1300px;
    margin: 40px auto;
    padding: 0 16px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 36px 30px;
}

/* ---------- COURSE CARD ---------- */
.course-card-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--card-border);
    box-shadow: 0 20px 50px -15px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-card-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 30px 60px -10px rgba(0, 0, 0, 0.15);
}

/* ========== CARD HEADER (SVG Banner + Badge) ========== */
.course-card-banner-wrapper {
    position: relative;
    width: 100%;
    line-height: 0;
    border-radius: var(--radius) var(--radius) 0 0;
    overflow: visible;
}

.course-card-banner-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius) var(--radius) 0 0;
}

/* Status Badge */
.course-card-status-badge {
    position: absolute;
    top: -14px;
    left: 24px;
    z-index: 20;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 22px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.82rem;
    letter-spacing: 0.3px;
    color: white;
    box-shadow: 0 10px 25px -6px rgba(0, 0, 0, 0.2);
    white-space: nowrap;
    font-family: 'Inter', 'Hind Siliguri', sans-serif;
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.course-card-status-badge i {
    font-size: 0.85rem;
}

.course-card-badge-ongoing {
    background: var(--badge-ongoing-bg);
}

.course-card-badge-upcoming {
    background: var(--badge-upcoming-bg);
}

.course-card-badge-offline {
    background: var(--badge-offline-bg);
}

/* ========== CARD BODY ========== */
.course-card-body {
    padding: 20px 18px 18px;
    background: transparent;
    border-radius: 0 0 var(--radius) var(--radius);
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* ========== COURSE INFO GRID (2×2) ========== */
.course-card-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 24px;
}

.course-card-info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 14px 16px;
    background: var(--info-card-bg);
    border-radius: 10px;
    border: 1px solid var(--info-card-border);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    transition: border-color 0.3s ease, background 0.3s ease;
}

.course-card-info-item:hover {
    border-color: rgba(212, 175, 55, 0.3);
    background: rgba(0, 0, 0, 0.03);
}

.course-card-info-icon-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.course-card-info-item i {
    color: var(--accent);
    font-size: 1rem;
    width: 16px;
    flex-shrink: 0;
}

.course-card-info-label {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1.1;
}

.course-card-info-value {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.3;
    letter-spacing: 0.2px;
}

/* ========== AUDIENCE BOX ========== */
.course-card-audience-box {
    background: var(--audience-bg);
    border-left: 4px solid var(--audience-border);
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.course-card-audience-box i {
    color: var(--audience-border);
    font-size: 1rem;
}

/* ========== ACTION BUTTONS ========== */
.course-card-button-group {
    display: flex;
    gap: 12px;
    margin-bottom: 28px;
}

.course-card-btn {
    flex: 1;
    padding: 14px 18px;
    border-radius: 8px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.9rem;
    text-decoration: none;
    min-height: 50px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    font-family: 'Inter', 'Hind Siliguri', sans-serif;
    letter-spacing: 0.3px;
    border: 1px solid transparent;
}

.course-card-btn-primary {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-color);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.25);
}

.course-card-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4);
    filter: brightness(1.05);
}

.course-card-btn-secondary {
    border: 1.5px solid var(--btn-secondary-border);
    color: var(--btn-secondary-color);
    background: transparent;
}

.course-card-btn-secondary:hover {
    background: rgba(212, 175, 55, 0.06);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.1);
}

.course-card-btn-disabled {
    background: #e2e8f0 !important;
    pointer-events: none;
    opacity: 0.6;
    border-color: #cbd5e1 !important;
    color: #94a3b8 !important;
    cursor: not-allowed;
    box-shadow: none !important;
}

/* ========== ENROLLMENT STATS + COUNTDOWN ========== */
.course-card-stats-panel {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 16px;
    padding: 18px 18px;
    border-radius: 12px;
    background: var(--stats-panel-bg);
    border: 1px solid var(--stats-panel-border);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    margin-top: auto;
}

.course-card-stats-enrollment-label {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 6px;
}

.course-card-stats-enrollment-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: #059669;
    letter-spacing: -0.5px;
}

.course-card-countdown-heading {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 8px;
    text-align: center;
}

.course-card-countdown-digits {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.course-card-countdown-digits span {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    min-width: 32px;
    text-align: center;
}

.course-card-countdown-unit-labels {
    display: flex;
    justify-content: center;
    gap: 10px;
    font-size: 9px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-top: 4px;
}

.course-card-countdown-unit-labels span {
    min-width: 32px;
    text-align: center;
}

/* ============================================================
   RESPONSIVE – All breakpoints at the end
   ============================================================ */

/* ---------- Tablet (max-width: 768px) ---------- */
@media (max-width: 768px) {
    .course-card-grid {
        gap: 24px 20px;
    }

    .course-card-button-group {
        flex-direction: column;
        gap: 10px;
    }

    .course-card-btn {
        width: 100%;
    }
}

/* ---------- Mobile (max-width: 480px) ---------- */
@media (max-width: 480px) {
    .course-card-grid {
        margin: 20px auto;
        padding: 0 10px;
    }

    .course-card-info-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .course-card-info-item {
        padding: 10px 12px;
        gap: 6px;
    }

    .course-card-info-icon-row {
        gap: 8px;
    }

    .course-card-info-item i {
        font-size: 0.9rem;
        width: 14px;
    }

    .course-card-info-label {
        font-size: 0.6rem;
    }

    .course-card-info-value {
        font-size: 0.8rem;
    }

    .course-card-stats-panel {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .course-card-countdown-digits span {
        font-size: 1.2rem;
    }

    .course-card-btn {
        font-size: 0.85rem;
        padding: 12px 14px;
    }

    .course-card-status-badge {
        font-size: 0.75rem;
        padding: 6px 16px;
        top: -12px;
        left: 16px;
    }
}

/* ---------- Small Mobile (max-width: 360px) ---------- */
@media (max-width: 360px) {
    .course-card-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .course-card-info-grid {
        gap: 6px;
    }

    .course-card-info-item {
        padding: 8px 10px;
    }

    .course-card-info-value {
        font-size: 0.75rem;
    }

    .course-card-info-label {
        font-size: 0.58rem;
    }

    .course-card-countdown-digits span {
        font-size: 1.1rem;
        min-width: 26px;
    }

    .course-card-countdown-digits {
        gap: 6px;
    }

    .course-card-countdown-unit-labels {
        gap: 6px;
        font-size: 7px;
    }

    .course-card-countdown-unit-labels span {
        min-width: 26px;
    }

    .course-card-status-badge {
        font-size: 0.7rem;
        padding: 5px 14px;
        top: -10px;
        left: 12px;
        gap: 6px;
    }
}