/* Premium Dark Mode Design System */
:root {
    /* Color Palette */
    --bg-dark: #07090e; /* Deep charcoal/black */
    --surface-dark: #121621;
    --surface-light: #1a1f2e;
    
    /* Neon Accents */
    --accent-primary: #00f0ff; /* Neon cyan */
    --accent-primary-glow: rgba(0, 240, 255, 0.4);
    --accent-secondary: #7000ff; /* Deep purple */
    --accent-secondary-glow: rgba(112, 0, 255, 0.4);
    
    /* Typography Colors */
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Utility Colors */
    --border-color: rgba(255, 255, 255, 0.08);
    --success-color: #10b981;
    --danger-color: #f43f5e;
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing & Layout */
    --container-max-width: 1200px;
    --border-radius: 12px;
    --border-radius-lg: 24px;
    
    /* Glassmorphism */
    --glass-bg: rgba(18, 22, 33, 0.6);
    --glass-border: 1px solid rgba(255, 255, 255, 0.05);
    --glass-blur: blur(16px);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Background Gradients */
.bg-glow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.bg-glow-cyan {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent-primary-glow) 0%, transparent 60%);
    opacity: 0.3;
    filter: blur(100px);
}

.bg-glow-purple {
    position: absolute;
    bottom: -10%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--accent-secondary-glow) 0%, transparent 60%);
    opacity: 0.2;
    filter: blur(120px);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: #fff;
    text-shadow: 0 0 8px var(--accent-primary-glow);
}

/* Navbar (Glassmorphism) */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 5%;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: var(--glass-border);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -1px;
    background: linear-gradient(to right, #fff, var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.navbar-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), #0099ff);
    color: #000;
    box-shadow: 0 4px 15px var(--accent-primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-primary-glow);
    color: #000;
}

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

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Containers */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 6rem 2rem 3rem 2rem;
}

/* Hero Section */
.hero {
    min-height: 85vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding-top: 5rem;
}

.hero h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #fff 30%, var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin-bottom: 3rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* Cards (Glassmorphism) */
.card {
    background: var(--surface-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: 0 20px 50px rgba(0, 240, 255, 0.1);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: linear-gradient(180deg, var(--surface-light) 0%, var(--surface-dark) 100%);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: left;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #fff;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-control,
input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"] {
    width: 100%;
    padding: 1rem 1.25rem;
    background-color: rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: all 0.3s ease;
}

.form-control:focus,
input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--accent-primary-glow);
    background-color: rgba(0,0,0,0.4);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem 5%;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 1.5rem;
    }
}

/* Auth Pages Specific */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
    padding: 2rem 1rem;
}

.auth-card {
    background: var(--surface-dark);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    backdrop-filter: blur(10px);
}

.auth-header {
    margin-bottom: 2rem;
}

.auth-brand {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    display: inline-block;
    background: linear-gradient(to right, #fff, var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-header h2 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 1.5rem 0;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.auth-divider:not(:empty)::before {
    margin-right: .75em;
}

.auth-divider:not(:empty)::after {
    margin-left: .75em;
}

.social-btn-group {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.btn-social {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 0.6rem;
    border-radius: 8px;
    color: var(--text-primary);
    transition: all 0.2s ease;
    cursor: pointer;
    text-decoration: none;
}

.btn-social:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-secondary);
}

.btn-social svg {
    width: 20px;
    height: 20px;
}

.auth-footer {
    margin-top: 2rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    gap: 1rem;
}

.auth-footer a {
    color: var(--text-muted);
}
.auth-footer a:hover {
    color: var(--text-primary);
}