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

:root {
    --primary: #FF6B00;
    --primary-dark: #9E5C3F;
    --gradient: linear-gradient(135deg, #FF6B00 0%, #9E5C3F 100%);
    --bg: #F5F5F0;
    --bg-warm: #FEF9F3;
    --card-bg: #ffffff;
    --text: #2C2C2C;
    --text-muted: #666666;
    --border: #E5E5E5;
    --success: #2E7D32;
    --danger: #C62828;
    --warning: #E65100;
    --radius: 12px;
    --shadow: 0 2px 12px rgba(0,0,0,0.07);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* ── Topbar ── */
.topbar {
    background: var(--gradient);
    color: #fff;
    padding: 14px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(255,107,0,0.25);
}
.topbar-brand { font-size: 18px; font-weight: 700; color: #fff; text-decoration: none; }
.topbar-user { display: flex; align-items: center; gap: 16px; }
.topbar-user span { font-size: 14px; opacity: 0.9; }
.topbar-logout {
    background: rgba(255,255,255,0.2);
    color: #fff;
    padding: 6px 14px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
    transition: background 0.2s;
}
.topbar-logout:hover { background: rgba(255,255,255,0.35); }

/* ── Page wrapper ── */
.page { max-width: 1100px; margin: 32px auto; padding: 0 20px 40px; }
.page-sm { max-width: 680px; margin: 32px auto; padding: 0 20px 40px; }

/* ── Card ── */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.card-body { padding: 28px; }
.card-header {
    padding: 18px 28px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.card-header h2 { font-size: 17px; color: var(--text); }

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    border: none;
    transition: transform 0.15s, opacity 0.15s;
    font-family: inherit;
}
.btn:hover { opacity: 0.9; transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--gradient); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger  { background: var(--danger);  color: #fff; }
.btn-ghost   { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 10px; }
.btn-full { width: 100%; justify-content: center; }
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* ── Progress bar ── */
.progress-wrap { background: #E5E5E5; border-radius: 100px; height: 10px; overflow: hidden; }
.progress-bar  { background: var(--gradient); height: 100%; border-radius: 100px; transition: width 0.4s; }

/* ── Lesson card ── */
.lesson-item {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 18px 28px;
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
}
.lesson-item:last-child { border-bottom: none; }
.lesson-item:hover { background: #FEF9F3; }
.lesson-num {
    width: 44px; height: 44px;
    background: var(--gradient);
    color: #fff;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 16px;
    flex-shrink: 0;
}
.lesson-num.done { background: var(--success); }
.lesson-info { flex: 1; }
.lesson-info h3 { font-size: 15px; margin-bottom: 2px; }
.lesson-info p  { font-size: 13px; color: var(--text-muted); }
.lesson-meta { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

/* ── Badge ── */
.badge {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}
.badge-success { background: #E8F5E9; color: #2E7D32; }
.badge-info    { background: #FFF3E0; color: #E65100; }
.badge-warning { background: #FFF8E1; color: #F57F17; }
.badge-danger  { background: #FFEBEE; color: #C62828; }

/* ── Alert ── */
.alert {
    padding: 13px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}
.alert-danger  { background: #FFEBEE; color: #C62828; }
.alert-success { background: #E8F5E9; color: #2E7D32; }
.alert-warning { background: #FFF8E1; color: #F57F17; }

/* ── Stats grid ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card { background: var(--card-bg); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.stat-card .num { font-size: 32px; font-weight: 700; color: var(--primary); }
.stat-card .lbl { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ── Auth pages ── */
.auth-body {
    min-height: 100vh;
    background: var(--gradient);
    display: flex; align-items: center; justify-content: center; padding: 20px;
}
.auth-box {
    background: #fff;
    padding: 44px;
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    max-width: 440px; width: 100%;
}
.auth-logo { text-align: center; margin-bottom: 32px; }
.auth-logo h1 { font-size: 26px; color: var(--text); }
.auth-logo p  { color: var(--text-muted); font-size: 14px; margin-top: 4px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 14px; color: #374151; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 11px 14px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.2s;
    font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--primary);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-check { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; cursor: pointer; font-size: 14px; color: #555; }
.form-check a { color: var(--primary); }

/* ── Video player ── */
.video-wrap {
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    margin-bottom: 24px;
}
.video-wrap video, .video-wrap iframe {
    width: 100%; display: block;
    aspect-ratio: 16/9;
    border: none;
}

/* ── Responsive ── */
@media(max-width: 640px) {
    .page, .page-sm { padding: 0 12px 32px; }
    .auth-box { padding: 28px 20px; }
    .lesson-item { flex-wrap: wrap; }
    .lesson-meta { width: 100%; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}