/* =============================================================
   LMS Portal - Main Stylesheet
   ============================================================= */
@import url('https://fonts.googleapis.com/css2?family=Jost:wght@300;400;500;600;700&display=swap');

/* ── CSS Variables ── */
:root {
    --primary:      #4f46e5;
    --primary-dark: #3730a3;
    --success:      #10b981;
    --warning:      #f59e0b;
    --danger:       #ef4444;
    --info:         #3b82f6;
    --sidebar-w:    260px;
    --sidebar-bg:   linear-gradient(160deg, #1e1b4b 0%, #312e81 100%);
    --topnav-h:     60px;
    --bg:           #f8f9fb;
    --card-radius:  12px;
    --transition:   .3s ease;
}

*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: 'Jost', system-ui, sans-serif;
    font-size: 14px;
    background: var(--bg);
    color: #1e293b;
    margin: 0;
}

/* ── Auth Pages ── */
.auth-gradient {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #2563eb 100%);
    min-height: 100vh;
}

.auth-gradient .card {
    backdrop-filter: blur(10px);
    border-radius: 20px !important;
}

/* ── Sidebar Layout ── */
.wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-w);
    background: var(--sidebar-bg);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform var(--transition);
}

.sidebar-header {
    padding: 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.12);
}

.sidebar-nav {
    padding: 8px 12px;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255,255,255,.75);
    padding: 10px 14px;
    border-radius: 10px;
    margin-bottom: 2px;
    font-weight: 500;
    transition: all var(--transition);
    text-decoration: none;
}

.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link.active {
    background: rgba(255,255,255,.15);
    color: #fff;
    transform: translateX(2px);
}

.nav-icon {
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

/* ── Main Content ── */
.main-content {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin var(--transition);
}

/* ── Top Navbar ── */
.top-navbar {
    height: var(--topnav-h);
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: 0 1px 4px rgba(0,0,0,.04);
}

.content-area {
    padding: 24px;
    flex: 1;
}

/* ── Stat Cards ── */
.stat-card {
    border-radius: var(--card-radius) !important;
    transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,.1) !important;
}
.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* ── Course Cards ── */
.course-card {
    border-radius: var(--card-radius) !important;
    transition: transform var(--transition), box-shadow var(--transition);
    overflow: hidden;
}
.course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0,0,0,.12) !important;
}

/* ── Welcome Banner ── */
.welcome-banner {
    background: var(--sidebar-bg) !important;
    border-radius: var(--card-radius) !important;
}

/* ── Tables ── */
.table th {
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: #64748b;
}

/* ── Avatars ── */
.avatar-sm { width: 36px; height: 36px; }
.avatar-xs { width: 26px; height: 26px; }

/* ── Progress Bars ── */
.progress { border-radius: 100px; background: #e2e8f0; }
.progress-bar { border-radius: 100px; transition: width .6s ease; }

/* ── Buttons ── */
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(79,70,229,.35);
}

/* ── Cards ── */
.card { border-radius: var(--card-radius) !important; }

/* ── Responsive Sidebar Toggle ── */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.show { transform: translateX(0); }
    .main-content { margin-left: 0; }
}

/* ── Utility ── */
.cursor-pointer { cursor: pointer; }

.bg-primary-subtle  { background: rgba(79,70,229,.1) !important; }
.bg-success-subtle  { background: rgba(16,185,129,.1) !important; }
.bg-warning-subtle  { background: rgba(245,158,11,.1) !important; }
.bg-danger-subtle   { background: rgba(239,68,68,.1)  !important; }
.bg-info-subtle     { background: rgba(59,130,246,.1) !important; }

/* Video Player */
.lesson-video {
    width: 100%;
    border-radius: 12px;
    background: #000;
    aspect-ratio: 16/9;
}

/* Badge overrides */
.badge { font-weight: 500; letter-spacing: .3px; }

/* Sidebar toggler */
.sidebar-toggler { color: #64748b; border:none; padding: 4px 8px; }
.sidebar-toggler:hover { color: var(--primary); }

/* Scrollbars */
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.2); border-radius: 4px; }