:root {
    --bg-main: #0a0b10;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #a0a5b8;
    --accent-1: #4facfe;
    --accent-2: #00f2fe;
    --accent-3: #8a2387;
    --accent-4: #e94057;
    --success: #0df0a3;
    --glass-blur: blur(16px);
}

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

body {
    font-family: 'Outfit', sans-serif;
    color: var(--text-primary);
    background: var(--bg-main);
    background-image:
        radial-gradient(circle at 15% 50%, rgba(79, 172, 254, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(138, 35, 135, 0.15), transparent 25%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Glass Header */
.glass-header {
    background: rgba(10, 11, 16, 0.8);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.gradient-text {
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.accent-text-pink {
    background: linear-gradient(90deg, var(--accent-3), var(--accent-4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.btn-nav {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
}

.btn-nav:hover {
    color: var(--text-primary);
}

/* Layout */
#main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Cards & Containers - Glassmorphism */
.glass-panel {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: var(--glass-blur);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Registration Form */
.grid-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.full-width {
    grid-column: span 2;
}

label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

input,
select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 0.8rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
}

input:focus,
select:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 2px rgba(79, 172, 254, 0.2);
    background: rgba(255, 255, 255, 0.08);
}

.btn-primary {
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    border: none;
    border-radius: 10px;
    padding: 1rem 2rem;
    color: #fff;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    font-family: inherit;
    transition: transform 0.2s, box-shadow 0.2s;
    width: 100%;
    margin-top: 1rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--accent-2);
}

/* Typography styles */
h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

p.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 2rem;
    margin-top: 1.5rem;
}

/* Stats Cards */
.stats-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.15);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* QR Code Section */
.qr-card {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
}

.qr-box {
    width: 200px;
    height: 200px;
    background: white;
    border-radius: 12px;
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 30px rgba(0, 242, 254, 0.2);
}

.qr-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Session / Today Class Card */
.session-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--card-border);
}

.session-content ul {
    list-style: none;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.session-content li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-content li::before {
    content: "•";
    color: var(--accent-1);
    font-size: 1.5rem;
}

/* Badges & Tags */
.badge {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(13, 240, 163, 0.1);
    color: var(--success);
}

.tag {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid var(--card-border);
}

.tag-success {
    border-color: var(--success);
    color: var(--success);
    background: rgba(13, 240, 163, 0.05);
}

.tag-warning {
    border-color: #f1c40f;
    color: #f1c40f;
    background: rgba(241, 196, 15, 0.05);
}

.tag-danger {
    border-color: var(--accent-4);
    color: var(--accent-4);
    background: rgba(233, 64, 87, 0.05);
}

@media (max-width: 768px) {
    .grid-form {
        grid-template-columns: 1fr;
    }

    .form-group.full-width {
        grid-column: 1;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .stats-container {
        grid-template-columns: 1fr;
    }
}