/* css/style.css */
:root {
    /* Premium Dark Mode Color Palette */
    --bg-primary: #0f172a; /* Slate 900 */
    --bg-secondary: #1e293b; /* Slate 800 */
    --text-primary: #f8fafc; /* Slate 50 */
    --text-secondary: #94a3b8; /* Slate 400 */
    --accent-color: #3b82f6; /* Blue 500 */
    --accent-hover: #2563eb; /* Blue 600 */
    --success: #10b981;
    --danger: #ef4444;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Glassmorphism Navigation */
.glass-nav {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

.nav-container, .main-content, .footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--accent-color);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
}

/* Buttons */
.btn {
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
    display: inline-block;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary) !important;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-primary {
    background: var(--accent-color);
    color: #fff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

/* Main Content */
.main-content {
    flex: 1;
    padding-top: 3rem;
    padding-bottom: 3rem;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 4rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Grid Layout for Tests */
.test-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

/* Glass Card */
.glass-card {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.2);
}

.test-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.badge {
    background: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.test-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.test-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
}

/* Footer */
.glass-footer {
    background: var(--bg-secondary);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
}