/* ═══════════════════════════════════════════════════════════
   AFV By Irfan — Design System v3.0
   Clean White/Light Theme with Blue Accents
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary:     #2563eb;
    --primary-h:   #3b82f6;
    --primary-l:   #dbeafe;
    --primary-bg:  #eff6ff;
    --accent:      #7c3aed;
    --success:     #16a34a;
    --success-bg:  #dcfce7;
    --warning:     #d97706;
    --warning-bg:  #fef3c7;
    --danger:      #dc2626;
    --danger-bg:   #fef2f2;
    --bg:          #f0f2f5;
    --bg-white:    #ffffff;
    --bg-card:     #ffffff;
    --bg-sidebar:  #ffffff;
    --border:      #e2e8f0;
    --border-h:    #cbd5e1;
    --text:        #1e293b;
    --text-dim:    #64748b;
    --text-muted:  #94a3b8;
    --sidebar-w:   260px;
    --topbar-h:    60px;
    --radius:      12px;
    --radius-sm:   8px;
    --shadow-sm:   0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:   0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg:   0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-xl:   0 20px 50px -12px rgba(0,0,0,0.12);
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }

.shadow-app {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-h); }

/* ── Sidebar ────────────────────────────────────────────── */
.sa-sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-w);
    height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 200;
    transition: transform 0.3s ease;
    box-shadow: 1px 0 0 var(--border);
}

.sa-sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
}
.sa-brand-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}
.sa-brand-text strong { color: var(--text); font-size: 0.95rem; display: block; font-weight: 700; }
.sa-brand-text small { color: var(--text-muted); font-size: 0.7rem; }

/* Search Box in Sidebar */
.sa-sidebar-search {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}
.sa-search-input {
    width: 100%;
    padding: 0.55rem 0.75rem 0.55rem 2.2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.82rem;
    color: var(--text);
    background: var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'%3E%3C/circle%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'%3E%3C/line%3E%3C/svg%3E") no-repeat 0.6rem center;
    transition: all 0.2s;
}
.sa-search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
    background-color: var(--bg-white);
}
.sa-search-input::placeholder { color: var(--text-muted); }

/* Nav Section Labels */
.sa-nav-section {
    padding: 1rem 1.5rem 0.4rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
}

/* Nav Links */
.sa-sidebar-nav {
    flex: 1;
    padding: 0.5rem 0;
    overflow-y: auto;
}
.sa-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.6rem 1.5rem;
    color: var(--text-dim);
    font-size: 0.88rem;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
    cursor: pointer;
}
.sa-nav-link:hover {
    color: var(--primary);
    background: var(--primary-bg);
}
.sa-nav-link.active {
    color: var(--primary);
    background: var(--primary-bg);
    border-left-color: var(--primary);
    font-weight: 600;
}
.sa-nav-icon { font-size: 1.1rem; width: 24px; text-align: center; }

/* Sidebar Footer */
.sa-sidebar-footer {
    padding: 0.75rem 1.5rem;
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.sa-user-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 0.4rem;
}
.sa-user-avatar {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.85rem; color: #fff;
}
.sa-user-info strong { display: block; color: var(--text); font-size: 0.82rem; }
.sa-user-info small { color: var(--text-muted); font-size: 0.7rem; }
.sa-logout { color: var(--danger) !important; font-size: 0.82rem !important; padding: 0.35rem 0 !important; }
.sa-logout:hover { color: #b91c1c !important; }

/* ── Mobile Topbar ──────────────────────────────────────── */
.sa-topbar {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--topbar-h);
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    z-index: 150;
    align-items: center;
    padding: 0 1rem;
    gap: 12px;
    box-shadow: var(--shadow-sm);
}
.sa-hamburger {
    background: none; border: none;
    color: var(--text); font-size: 1.4rem;
    cursor: pointer; padding: 4px;
}
.sa-topbar-title { font-weight: 700; font-size: 1rem; color: var(--text); }

/* ── Main Content ───────────────────────────────────────── */
.sa-main {
    margin-left: var(--sidebar-w);
    min-height: 100vh;
    padding: 1.75rem 2rem;
    padding-bottom: 5rem;
}
.sa-content {
    max-width: 1200px;
    margin: 0 auto;
}

/* ── Page Header ────────────────────────────────────────── */
.sa-page-header {
    margin-bottom: 1.75rem;
}
.sa-page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.2rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.sa-page-header p {
    color: var(--text-dim);
    font-size: 0.88rem;
}

/* ── Stat Cards ─────────────────────────────────────────── */
.sa-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}
.sa-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}
.sa-stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.sa-stat-icon {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
}
.sa-stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.2rem;
}
.sa-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

/* ── Cards ──────────────────────────────────────────────── */
.sa-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}
.sa-card:hover {
    box-shadow: var(--shadow-md);
}
.sa-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}

/* ── Course Cards Grid ──────────────────────────────────── */
.sa-courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}
.sa-course-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.35s ease;
    cursor: default;
    box-shadow: var(--shadow-sm);
    position: relative;
}
.sa-course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-h);
}
.sa-course-thumb {
    height: 170px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    background: linear-gradient(135deg, #e0e7ff, #dbeafe);
    position: relative;
    overflow: hidden;
}
.sa-course-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Price Badge on thumbnail */
.sa-price-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--primary);
    color: #fff;
    padding: 0.3rem 0.8rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 5;
    box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}

/* Settings icon on card */
.sa-course-settings {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 28px; height: 28px;
    background: rgba(255,255,255,0.85);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(0,0,0,0.05);
}
.sa-course-settings:hover {
    background: #fff;
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

.sa-course-body {
    padding: 1rem 1.25rem 1.25rem;
}
.sa-course-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.sa-course-desc {
    color: var(--text-dim);
    font-size: 0.82rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.sa-course-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}
.sa-course-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
}
.sa-course-price small {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Enrolled course card extras */
.sa-course-progress-wrap {
    margin-top: 1rem;
}
.sa-progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.3rem;
}
.sa-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
    transition: width 0.5s ease;
}
.sa-progress-label {
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* ── Buttons ────────────────────────────────────────────── */
.sa-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0.55rem 1.2rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}
.sa-btn-primary {
    background: var(--primary);
    color: #fff;
}
.sa-btn-primary:hover {
    background: #1d4ed8;
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
    transform: translateY(-1px);
}
.sa-btn-success {
    background: var(--success);
    color: #fff;
}
.sa-btn-success:hover {
    background: #15803d;
}
.sa-btn-danger {
    background: var(--danger);
    color: #fff;
}
.sa-btn-danger:hover {
    background: #b91c1c;
}
.sa-btn-ghost {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
}
.sa-btn-ghost:hover {
    background: var(--border);
    color: var(--text);
    border-color: var(--border-h);
}
.sa-btn-sm {
    padding: 0.4rem 0.9rem;
    font-size: 0.78rem;
    border-radius: 6px;
}
.sa-btn-block { width: 100%; }

/* Login to Enroll specific button */
.sa-login-to-enroll {
    background: var(--primary) !important;
    color: #fff !important;
    border: none !important;
    padding: 0.4rem 1rem !important;
    border-radius: 6px !important;
    font-size: 0.78rem !important;
    font-weight: 600 !important;
}
.sa-login-to-enroll:hover {
    background: #1d4ed8 !important;
    box-shadow: 0 2px 8px rgba(37,99,235,0.3) !important;
}

/* Button loading state */
.sa-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}
.sa-btn.loading::after {
    content: '';
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: saSpinner 0.6s linear infinite;
    margin-left: 6px;
}

/* ── Tables ─────────────────────────────────────────────── */
.sa-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
}
.sa-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
.sa-table thead th {
    text-align: left;
    padding: 0.9rem 1rem;
    color: var(--text-dim);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    white-space: nowrap;
}
.sa-table tbody td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    vertical-align: middle;
}
.sa-table tbody tr:hover {
    background: var(--primary-bg);
}
.sa-table tbody tr:last-child td { border-bottom: none; }
.sa-table-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 3rem 1rem !important;
    font-size: 0.9rem;
}

/* ── Badges ─────────────────────────────────────────────── */
.sa-badge {
    display: inline-block;
    padding: 0.25rem 0.7rem;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.sa-badge-success { background: var(--success-bg); color: var(--success); }
.sa-badge-warning { background: var(--warning-bg); color: var(--warning); }
.sa-badge-danger  { background: var(--danger-bg);  color: var(--danger); }
.sa-badge-info    { background: var(--primary-l);   color: var(--primary); }

/* ── Form Elements ──────────────────────────────────────── */
.sa-form-group {
    margin-bottom: 1.2rem;
}
.sa-form-label {
    display: block;
    color: var(--text);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.4rem;
}
.sa-form-input,
.sa-form-select,
.sa-form-textarea {
    width: 100%;
    padding: 0.65rem 0.9rem;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: inherit;
    font-size: 0.88rem;
    transition: all 0.2s ease;
}
.sa-form-input:focus,
.sa-form-select:focus,
.sa-form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.sa-form-input::placeholder { color: var(--text-muted); }
.sa-form-select option { background: #fff; }
.sa-form-textarea { resize: vertical; min-height: 100px; }

/* ── Admin Modals (fullscreen overlay) ──────────────────── */
.sa-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
    z-index: 500;
    display: none;
    align-items: center;
    justify-content: center;
}
.sa-modal.active {
    display: flex;
}
.sa-modal-content {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 90%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(10px);
    transition: transform 0.3s ease;
    position: relative;
}
.sa-modal.active .sa-modal-content {
    transform: scale(1) translateY(0);
}

/* ── Enrollment Modal (uses sa-modal-overlay) ──────────── */
.sa-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(4px);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.sa-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}
.sa-modal-overlay .sa-enroll-modal-inner {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 90%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s ease;
    position: relative;
}
.sa-modal-overlay.active .sa-enroll-modal-inner {
    transform: scale(1) translateY(0);
}
.sa-modal-close {
    position: absolute;
    top: 1rem; right: 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-dim);
    width: 32px; height: 32px;
    border-radius: 50%;
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.sa-modal-close:hover {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger);
}

/* Modal Steps */
.sa-modal-step { display: none; }
.sa-modal-step.active { display: block; }
.sa-modal-step h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.4rem;
}
.sa-modal-step p {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

/* Payment method cards */
.sa-pay-method {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-bottom: 0.8rem;
}
.sa-pay-method strong {
    display: block;
    color: var(--text);
    margin-bottom: 0.3rem;
}
.sa-pay-method span {
    color: var(--text-dim);
    font-size: 0.83rem;
}
.sa-pay-method code {
    background: var(--primary-l);
    color: var(--primary);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Result display in modal */
.sa-result {
    text-align: center;
    padding: 2rem 0;
}
.sa-result-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.sa-result h3 {
    font-size: 1.2rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}
.sa-result p {
    color: var(--text-dim);
    margin-bottom: 1.5rem;
}
.sa-result.success .sa-result-icon { color: var(--success); }
.sa-result.error .sa-result-icon { color: var(--danger); }

/* ── Loader / Spinner ───────────────────────────────────── */
.sa-loader {
    display: none;
    text-align: center;
    padding: 4rem 0;
    color: var(--text-dim);
}
.sa-loader.active { display: block; }
.sa-spinner {
    width: 36px; height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: saSpinner 0.7s linear infinite;
    margin: 0 auto 1rem;
}
@keyframes saSpinner {
    to { transform: rotate(360deg); }
}

/* ── Footer ─────────────────────────────────────────────── */
.sa-footer {
    position: fixed;
    bottom: 0;
    left: var(--sidebar-w);
    right: 0;
    text-align: center;
    padding: 0.6rem;
    color: var(--text-muted);
    font-size: 0.72rem;
    background: rgba(240,242,245,0.95);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-top: 1px solid var(--border);
    z-index: 100;
}
.sa-footer a { color: var(--primary); }

/* ── Manual Link Tool ───────────────────────────────────── */
.sa-link-tool {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 1rem;
    align-items: end;
}

/* ── Utility ────────────────────────────────────────────── */
.sa-text-center { text-align: center; }
.sa-mt-1 { margin-top: 0.5rem; }
.sa-mt-2 { margin-top: 1rem; }
.sa-mt-3 { margin-top: 1.5rem; }
.sa-mb-2 { margin-bottom: 1rem; }
.sa-flex { display: flex; }
.sa-flex-between { justify-content: space-between; }
.sa-flex-center { align-items: center; }
.sa-gap-1 { gap: 0.5rem; }
.sa-gap-2 { gap: 1rem; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
    .sa-sidebar {
        transform: translateX(-100%);
    }
    .sa-sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0,0,0,0.15);
    }
    .sa-topbar { display: flex; }
    .sa-main {
        margin-left: 0;
        padding-top: calc(var(--topbar-h) + 1rem);
        padding-left: 1rem;
        padding-right: 1rem;
    }
    .sa-footer { left: 0; }
    .sa-courses-grid {
        grid-template-columns: 1fr;
    }
    .sa-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .sa-link-tool {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 480px) {
    .sa-stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ── Overlay for mobile sidebar ─────────────────────────── */
.sa-sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.3);
    z-index: 190;
}
.sa-sidebar-overlay.active { display: block; }

/* ── Auth Pages (Login/Register) Light Theme Override ──── */
.sa-card h2 { color: var(--text); }
.sa-card p { color: var(--text-dim); }