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

:root {
    --bg-base: #09090b;        
    --bg-surface: #18181b;     
    --bg-surface-hover: #27272a;
    --brand-primary: #3b82f6;  
    --brand-primary-hover: #2563eb;
    --brand-glow: rgba(59, 130, 246, 0.15);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dark: #cbd5e1;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --radius-xl: 24px;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-premium: 0 20px 40px -15px rgba(0,0,0,0.5), 0 0 0 1px var(--border-subtle);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body::before {
    content: '';
    position: absolute;
    top: -10%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(circle, var(--brand-glow) 0%, rgba(9,9,11,0) 70%);
    z-index: -1;
    pointer-events: none;
}

.page-wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.auth-container, .dashboard-container {
    width: 100%;
    max-width: 480px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    box-shadow: var(--shadow-premium);
    margin: 120px auto 40px auto;
}

.dashboard-container {
    max-width: 900px;
}

.nav-bar {
    width: 100%;
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-subtle);
    background-color: rgba(9, 9, 11, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    padding: 0 5%;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.03em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.hero-section {
    margin-top: 180px;
    text-align: center;
    max-width: 860px;
    width: 100%;
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 100px;
    background-color: rgba(255,255,255,0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-dark);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 4.5rem;
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
    background: linear-gradient(180deg, #ffffff 0%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 48px auto;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    width: 100%;
    margin-top: 100px;
    margin-bottom: 80px;
}

.feature-card {
    background-color: rgba(24, 24, 27, 0.5);
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background-color: rgba(39, 39, 42, 0.8);
    border-color: rgba(255,255,255,0.15);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--brand-primary);
    font-size: 1.5rem;
    font-weight: bold;
}

.feature-card h4 {
    color: #ffffff;
    font-size: 1.25rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

.btn-primary {
    background-color: #ffffff;
    color: #000000;
    border: none;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary:hover {
    background-color: #e2e8f0;
    transform: scale(1.02);
}

.btn-secondary {
    background-color: transparent;
    color: #ffffff;
    border: 1px solid var(--border-subtle);
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.2);
}

input[type="text"], input[type="email"], input[type="password"], input[type="number"], select {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 20px;
    background-color: #09090b;
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: all 0.2s ease;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-dark);
}

footer {
    width: 100%;
    border-top: 1px solid var(--border-subtle);
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: auto;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 16px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-weight: 500;
}

.alert-error {
    background-color: rgba(244, 63, 94, 0.1);
    color: #f43f5e;
    border: 1px solid rgba(244, 63, 94, 0.3);
    padding: 16px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-weight: 500;
}

@media (max-width: 900px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    body::before {
        width: 100%;
        height: 400px;
    }
    
    .nav-bar {
        padding: 0 20px;
    }
    
    .hero-section {
        margin-top: 140px;
    }

    .hero-title {
        font-size: 2.75rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 32px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        padding: 0 10px;
    }

    .hero-buttons a {
        width: 100%;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-top: 60px;
    }
    
    .auth-container, .dashboard-container {
        margin: 100px 15px 40px 15px;
        padding: 32px 20px;
        width: calc(100% - 30px);
    }
}