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

:root {
    /* ---- "Forge" palette: warm paper + ember accent ---- */
    --ink: #1a1f2b;
    --paper: #faf7f2;
    --surface: #ffffff;
    --border: #e7e1d8;
    --muted: #7b7466;
    --ember: #c2542d;
    --ember-dark: #a63f1d;
    --ember-light: #f3ded3;
    --ember-gradient: linear-gradient(135deg, #d4642e, #a63f1d);
    --success: #2f855a;
    --success-bg: #e3f3ea;
    --danger: #c23d3d;
    --danger-bg: #fbe7e7;
    --warning-bg: #fbf0d9;
    --warning-text: #8a6416;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 2px rgba(26,31,43,0.04), 0 4px 16px rgba(26,31,43,0.06);
    --shadow-lg: 0 8px 30px rgba(26,31,43,0.10);
    --font-display: 'Sora', 'Hind Siliguri', sans-serif;
    --font-body: 'Inter', 'Hind Siliguri', sans-serif;
}

[data-theme="dark"] {
    --ink: #eae6df;
    --paper: #14171f;
    --surface: #1d212b;
    --border: #2b303c;
    --muted: #9a9488;
    --ember: #e07a4a;
    --ember-dark: #f3a479;
    --ember-light: #3a2a22;
    --ember-gradient: linear-gradient(135deg, #e07a4a, #c2542d);
    --success: #4fb37e;
    --success-bg: #16281f;
    --danger: #e07070;
    --danger-bg: #2e1a1a;
    --warning-bg: #2e2a18;
    --warning-text: #e0c069;
    --shadow: 0 1px 2px rgba(0,0,0,0.2), 0 4px 20px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    transition: background .2s ease, color .2s ease;
}

h1, h2, h3, h4, .font-display { font-family: var(--font-display); letter-spacing: -0.01em; }

a { color: inherit; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }

::selection { background: var(--ember-light); color: var(--ember-dark); }

:focus-visible { outline: 2px solid var(--ember); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}

/* ============ Header ============ */
.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow .2s ease;
}
.site-header.scrolled { box-shadow: 0 2px 16px rgba(26,31,43,0.08); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 15px 20px; gap: 16px; }
.logo {
    font-family: var(--font-display);
    font-size: 21px;
    font-weight: 800;
    color: var(--ink);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 9px;
    letter-spacing: -0.02em;
}
.logo-lockup { display: flex; align-items: center; gap: 12px; }
.logo-img { height: 84px; width: auto; display: block; image-rendering: -webkit-optimize-contrast; }
.logo-tagline { font-family: var(--font-body); font-size: 12px; font-weight: 700; color: var(--muted); letter-spacing: .06em; text-transform: uppercase; white-space: nowrap; }
@media (max-width: 600px) { .logo-tagline { display: none; } .logo-img { height: 60px; } }
.logo .mark {
    width: 30px; height: 30px;
    background: var(--ember-gradient);
    border-radius: 8px;
    display: inline-flex; align-items: center; justify-content: center;
    color: #fff; font-size: 15px; font-weight: 800;
    box-shadow: 0 3px 10px rgba(194,84,45,0.35);
    flex-shrink: 0;
}

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
    padding: 9px 14px;
    text-decoration: none;
    color: var(--ink);
    font-weight: 500;
    font-size: 14.5px;
    border-radius: var(--radius-sm);
    transition: background .15s ease, color .15s ease;
    white-space: nowrap;
}
.main-nav a:hover { background: var(--ember-light); color: var(--ember-dark); }
.btn-nav { background: var(--ember); color: #fff !important; padding: 9px 18px !important; font-weight: 600 !important; }
.btn-nav:hover { background: var(--ember-dark) !important; color: #fff !important; }

.nav-toggle {
    display: none;
    background: none; border: 1px solid var(--border); border-radius: var(--radius-sm);
    width: 40px; height: 40px; font-size: 18px; cursor: pointer; color: var(--ink);
    align-items: center; justify-content: center;
}

.lang-switch {
    display: flex; align-items: center; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; font-size: 12.5px; font-weight: 700;
}
.lang-switch a { padding: 6px 12px; text-decoration: none; color: var(--muted); border-radius: 0; }
.lang-switch a.active { background: var(--ember); color: #fff; }

.theme-toggle {
    background: none; border: 1px solid var(--border); border-radius: 999px;
    width: 36px; height: 36px; cursor: pointer; font-size: 16px; color: var(--ink);
    display: flex; align-items: center; justify-content: center;
}
.theme-toggle:hover { border-color: var(--ember); }

/* ============ Alerts ============ */
.alert { padding: 13px 16px; border-radius: var(--radius); margin: 18px 0; font-weight: 500; border: 1px solid transparent; font-size: 14.5px; }
.alert-success { background: var(--success-bg); color: var(--success); border-color: var(--success); }
.alert-error { background: var(--danger-bg); color: var(--danger); border-color: var(--danger); }

/* ============ Buttons ============ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 11px 22px; border-radius: var(--radius-sm); border: none; cursor: pointer;
    font-weight: 600; text-decoration: none; font-size: 14.5px; font-family: var(--font-body);
    transition: transform .1s ease, box-shadow .15s ease, background .15s ease;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--ember); color: #fff; box-shadow: 0 2px 8px rgba(194,84,45,0.35); }
.btn-primary:hover { background: var(--ember-dark); }
.btn-outline { background: transparent; border: 1.5px solid var(--ember); color: var(--ember); }
.btn-outline:hover { background: var(--ember-light); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(0.9); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { filter: brightness(0.92); }
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-block { width: 100%; text-align: center; }
.btn-icon { padding: 8px; width: 34px; height: 34px; }

/* ============ Forms ============ */
.form-group { margin-bottom: 17px; }
.form-group label { display: block; margin-bottom: 7px; font-weight: 600; font-size: 13.5px; color: var(--ink); }
.form-control {
    width: 100%; padding: 11px 13px; border: 1.5px solid var(--border);
    border-radius: var(--radius-sm); font-size: 14.5px; background: var(--surface); color: var(--ink);
    font-family: var(--font-body); transition: border-color .15s ease;
}
.form-control:focus { outline: none; border-color: var(--ember); }
.form-control::placeholder { color: var(--muted); }
textarea, textarea.form-control { resize: vertical; max-width: 100%; }
.wysiwyg-editor { resize: vertical; overflow-x: hidden; }

.auth-box { max-width: 430px; margin: 50px auto; background: var(--surface); padding: 36px; border-radius: var(--radius); box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
.auth-box h2 { margin-top: 0; font-size: 24px; }
.auth-box .switch-link { text-align: center; margin-top: 18px; font-size: 14px; color: var(--muted); }
.auth-box .switch-link a { color: var(--ember); font-weight: 600; text-decoration: none; }

/* ============ Hero ============ */
.hero {
    padding: 90px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
    background-image:
        linear-gradient(180deg, rgba(10,10,12,0.72), rgba(10,10,12,0.82)),
        url('../images/hero-banner.jpg');
    background-size: cover;
    background-position: center 30%;
    border-radius: var(--radius);
    margin: 20px 0 30px;
}
.hero::before {
    content: "";
    position: absolute;
    top: -120px; left: 50%;
    width: 900px; height: 500px;
    transform: translateX(-50%);
    background:
        radial-gradient(circle at 30% 30%, rgba(194,84,45,0.25), transparent 55%),
        radial-gradient(circle at 70% 60%, rgba(194,84,45,0.18), transparent 50%);
    pointer-events: none;
    z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 6px;
    background: rgba(255,255,255,0.12); color: #f3ded3;
    border: 1px solid rgba(255,255,255,0.18);
    backdrop-filter: blur(4px);
    padding: 6px 14px; border-radius: 999px; font-size: 12.5px; font-weight: 700;
    letter-spacing: .03em; margin-bottom: 20px;
}
.hero h1 { font-size: clamp(30px, 4.2vw, 48px); margin-bottom: 12px; font-weight: 800; line-height: 1.15; color: #fff; text-shadow: 0 2px 20px rgba(0,0,0,0.3); }
.hero p { color: rgba(255,255,255,0.82); font-size: 17px; margin-bottom: 0; max-width: 560px; margin-left: auto; margin-right: auto; }

.stats-bar { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin: 36px 0 6px; }
.stats-bar .stat { text-align: center; }
.stats-bar .stat .num { font-family: var(--font-display); font-size: 30px; font-weight: 800; color: #fff; }
.stats-bar .stat .label { font-size: 12.5px; color: rgba(255,255,255,0.65); text-transform: uppercase; letter-spacing: .04em; }

.search-bar { display: flex; gap: 10px; margin: 34px 0 6px; flex-wrap: wrap; justify-content: center; }
.search-bar .form-control { background: rgba(255,255,255,0.95); border: none; }

/* ============ Course grid & cards ============ */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 22px; margin: 24px 0 56px; }
.course-card {
    background: var(--surface); border-radius: var(--radius); overflow: hidden;
    box-shadow: var(--shadow); text-decoration: none; color: var(--ink);
    display: flex; flex-direction: column; border: 1px solid var(--border);
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.course-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--ember); }
.course-thumb-wrap { overflow: hidden; }
.course-thumb { width: 100%; height: 155px; object-fit: cover; background: linear-gradient(135deg, var(--ember-light), var(--border)); display: block; transition: transform .3s ease; }
.course-card:hover .course-thumb { transform: scale(1.06); }
.course-body { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.course-cat { font-size: 11.5px; color: var(--ember); font-weight: 700; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 7px; }
.course-title { font-size: 17px; font-weight: 700; margin: 0 0 8px; font-family: var(--font-display); line-height: 1.35; }
.course-desc { font-size: 13.5px; color: var(--muted); flex: 1; }
.course-rating { font-size: 13px; color: var(--warning-text); margin-top: 8px; font-weight: 600; }
.course-price { margin-top: 12px; font-weight: 800; font-size: 19px; color: var(--ember); font-family: var(--font-display); }
.course-price .old { text-decoration: line-through; color: var(--muted); font-weight: 500; font-size: 13.5px; margin-right: 8px; }
.course-card-link { display: block; text-decoration: none; color: inherit; }
.course-card-actions { padding: 0 18px 18px; }
.course-card-actions form { margin: 0; }
.course-card-actions .btn { width: 100%; }

/* ============ Course detail ============ */
.course-detail-head { display: grid; grid-template-columns: 1.3fr 1fr; gap: 34px; margin: 34px 0; align-items: start; }
.course-detail-head img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
.buy-card { background: var(--surface); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
.buy-card .price-big { font-size: 32px; font-weight: 800; color: var(--ember); margin-bottom: 18px; font-family: var(--font-display); }
.module-block { background: var(--surface); border-radius: var(--radius); margin-bottom: 14px; box-shadow: var(--shadow); border: 1px solid var(--border); overflow: hidden; }
.module-title { padding: 15px 18px; font-weight: 700; border-bottom: 1px solid var(--border); background: var(--ember-light); }
.lesson-row { padding: 12px 18px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-size: 14px; }
.lesson-row:last-child { border-bottom: none; }
.lesson-row a { text-decoration: none; color: var(--ink); font-weight: 500; }
.lesson-row a:hover { color: var(--ember); }
.lock-icon { color: var(--muted); }

.badge { padding: 4px 11px; border-radius: 999px; font-size: 11.5px; font-weight: 700; }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning-text); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-muted { background: var(--border); color: var(--muted); }

.payment-methods { display: flex; gap: 9px; margin: 16px 0; flex-wrap: wrap; }
.pm-badge { background: var(--paper); border: 1px solid var(--border); padding: 6px 12px; border-radius: var(--radius-sm); font-size: 11.5px; font-weight: 700; color: var(--muted); }

/* ============ Dashboard ============ */
.dash-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; margin: 24px 0 56px; }
.progress-bar-outer { background: var(--border); border-radius: 20px; height: 8px; margin-top: 10px; overflow: hidden; }
.progress-bar-inner { background: linear-gradient(90deg, var(--ember), var(--ember-dark)); height: 100%; border-radius: 20px; }

/* ============ Tables (admin) ============ */
table.data-table { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
table.data-table th, table.data-table td { padding: 13px 15px; border-bottom: 1px solid var(--border); text-align: left; font-size: 13.5px; }
table.data-table th { background: var(--paper); font-weight: 700; font-size: 12.5px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr:hover td { background: var(--ember-light); }

/* ============ Admin layout ============ */
.admin-wrap { display: grid; grid-template-columns: 230px 1fr; gap: 26px; margin: 26px 0 60px; }
.admin-sidebar { background: var(--surface); border-radius: var(--radius); padding: 16px; height: fit-content; box-shadow: var(--shadow); border: 1px solid var(--border); position: sticky; top: 84px; }
.admin-sidebar a { display: block; padding: 11px 13px; border-radius: var(--radius-sm); color: var(--ink); text-decoration: none; margin-bottom: 3px; font-weight: 500; font-size: 14px; }
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--ember-light); color: var(--ember-dark); }
.admin-content h1 { margin-top: 0; font-size: 26px; }
.card { background: var(--surface); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); margin-bottom: 22px; border: 1px solid var(--border); }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 26px; }
.stat-box { background: var(--surface); padding: 22px; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); }
.stat-box .num { font-size: 28px; font-weight: 800; color: var(--ember); font-family: var(--font-display); }
.stat-box .label { color: var(--muted); font-size: 12.5px; margin-top: 4px; }

.site-footer { background: var(--surface); border-top: 1px solid var(--border); padding: 40px 0 0; margin-top: 60px; color: var(--muted); font-size: 13.5px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; padding-bottom: 30px; }
.footer-col h4 { font-size: 13px; color: var(--ink); margin: 0 0 14px; text-transform: uppercase; letter-spacing: .04em; }
.footer-col p { line-height: 1.7; }
.footer-col a { display: block; color: var(--muted); text-decoration: none; margin-bottom: 9px; font-size: 13.5px; }
.footer-col a:hover { color: var(--ember); }
.footer-brand { display: flex; align-items: center; gap: 9px; font-family: var(--font-display); font-weight: 800; font-size: 18px; color: var(--ink); margin-bottom: 12px; }
.footer-bottom { border-top: 1px solid var(--border); padding: 16px 0; text-align: center; font-size: 12.5px; }
@media (max-width: 700px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.empty-state { text-align: center; padding: 70px 20px; color: var(--muted); }
.empty-state .icon { font-size: 40px; display: block; margin-bottom: 14px; }

/* ============ Star rating ============ */
.star-rating { display: inline-flex; gap: 2px; font-size: 18px; color: var(--border); }
.star-rating .filled { color: #e0a827; }
.star-input { display: flex; gap: 4px; font-size: 26px; cursor: pointer; }
.star-input span { color: var(--border); transition: color .1s ease; }
.star-input span.active, .star-input span:hover { color: #e0a827; }

/* ============ Mobile responsive ============ */
@media (max-width: 860px) {
    .course-detail-head { grid-template-columns: 1fr; }
    .admin-wrap { grid-template-columns: 1fr; }
    .admin-sidebar { position: static; display: flex; flex-wrap: wrap; gap: 4px; }
    .admin-sidebar a { flex: 1 1 auto; text-align: center; }
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed; top: 63px; left: 0; right: 0; bottom: 0;
        background: var(--paper); flex-direction: column; align-items: stretch;
        padding: 16px; gap: 6px; transform: translateX(100%); transition: transform .2s ease;
        overflow-y: auto;
    }
    .main-nav.open { transform: translateX(0); }
    .main-nav a { padding: 14px 16px; font-size: 16px; border-bottom: 1px solid var(--border); border-radius: 0; }
    .header-controls { display: flex; align-items: center; gap: 8px; }
}
@media (min-width: 861px) {
    .main-nav { display: flex !important; }
}