:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #151b3d;
    --bg-card: #1a2242;
    --bg-header: #0d1129;
    --text-primary: #e8edf7;
    --text-secondary: #9ca3af;
    --text-inverse: #ffffff;
    --border-color: #2d3651;
    --shadow: rgba(0, 0, 0, 0.3);
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-cyan: #06b6d4;
    --accent-purple: #8b5cf6;
    --button-primary: #3b82f6;
    --button-primary-hover: #2563eb;
    --button-danger: #ef4444;
    --button-danger-hover: #dc2626;
    --table-bg: #1a2242;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
}

[data-theme="dark"] {
    --bg-primary: #0a0e27;
    --bg-secondary: #151b3d;
    --bg-card: #1a2242;
    --bg-header: #0d1129;
    --text-primary: #e8edf7;
    --text-secondary: #9ca3af;
    --text-inverse: #ffffff;
    --border-color: #2d3651;
    --shadow: rgba(0, 0, 0, 0.3);
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-cyan: #06b6d4;
    --accent-purple: #8b5cf6;
    --button-primary: #3b82f6;
    --button-primary-hover: #2563eb;
    --button-danger: #ef4444;
    --button-danger-hover: #dc2626;
    --table-bg: #1a2242;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.08) 0px, transparent 50%);
    background-attachment: fixed;
}

header {
    background: rgba(13, 17, 41, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-inverse);
    padding: 1rem 5%;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border-color);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    letter-spacing: -0.02em;
}

.logo::before {
    content: '';
    width: 50px;
    height: 50px;
    background-image: url('/images/ninja-logo.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    display: inline-block;
    filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.3));
}

.logo a {
    color: var(--text-inverse);
    text-decoration: none;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 1rem;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--text-inverse);
}

.nav-links a:hover::after {
    width: 100%;
}

.theme-toggle {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-inverse);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    margin-left: 1rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--bg-card);
    border-color: var(--accent-blue);
    transform: scale(1.05);
}

main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 5%;
}

.hero {
    text-align: center;
    padding: 5rem 0 4rem;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    filter: blur(60px);
    z-index: -1;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.25rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing {
    margin: 4rem 0;
}

.pricing h2, .features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.pricing-card {
    background: var(--bg-card);
    padding: 2rem 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-blue);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.2);
}

.pricing-card:hover::before {
    opacity: 1;
}

.pricing-card.featured {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 2px solid var(--accent-blue);
    transform: scale(1.05);
}

.pricing-card.featured::before {
    opacity: 1;
}

.pricing-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.price {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 1rem 0;
    line-height: 1;
}

.save {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 20px;
    margin-bottom: 1rem;
}

button {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border: none;
    padding: 0.875rem 2rem;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

button:hover::before {
    width: 300px;
    height: 300px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

button:active {
    transform: translateY(0);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.feature {
    background: var(--bg-card);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.feature:hover {
    transform: translateY(-8px);
    border-color: var(--accent-blue);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.15);
}

.feature:hover::before {
    opacity: 0.05;
}

.feature h3 {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.feature p {
    color: var(--text-secondary);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
}

.auth-form {
    background: var(--bg-card);
    padding: 3rem 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 440px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.625rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input, .form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-group input:focus, .form-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group select, .form-select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-group select:focus, .form-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group small {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.error {
    color: var(--button-danger);
    margin-top: 1rem;
    text-align: center;
}

.success {
    color: var(--button-primary);
    margin-top: 1rem;
    text-align: center;
}

.g-recaptcha {
    margin: 1rem 0;
}

footer {
    background: var(--bg-header);
    color: var(--text-secondary);
    text-align: center;
    padding: 2.5rem;
    margin-top: 5rem;
    border-top: 1px solid var(--border-color);
}

.account-section {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.account-section:hover {
    border-color: var(--accent-blue);
}

.account-section h3 {
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
}

.button-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.button-secondary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.button-secondary:hover {
    background: var(--bg-card);
    border-color: var(--accent-blue);
}

.button-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.button-danger:hover {
    box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
}

table th, table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

table tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    background: var(--bg-card);
    margin: 5% auto;
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 520px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.modal-content h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
    font-weight: 700;
}

.modal-content p {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.modal-content ul {
    list-style: none;
    padding: 0;
}

.modal-content ul li {
    padding: 0.75rem 0;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.modal-content ul li:last-child {
    border-bottom: none;
}

.modal-content a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

.modal-content a:hover {
    color: var(--accent-cyan);
    text-decoration: underline;
}

.close {
    float: right;
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    line-height: 1;
    margin-top: -0.5rem;
}

.close:hover {
    color: var(--button-danger);
    transform: rotate(90deg);
}

@media (max-width: 768px) {
    .nav-links a {
        margin-left: 0.5rem;
        font-size: 0;
        padding: 0.5rem;
    }
    
    .nav-links a::before {
        font-size: 1.2rem;
    }
    
    .nav-links a[href="/home"]::before {
        content: "🏠";
    }
    
    .nav-links a[href="/account"]::before,
    .nav-links a[href*="account"]::before {
        content: "👤";
    }
    
    .nav-links a[href="/terms"]::before,
    .nav-links a[href*="terms"]::before {
        content: "📋";
    }
    
    .nav-links a[href="/privacy"]::before,
    .nav-links a[href*="privacy"]::before {
        content: "🔒";
    }
    
    .nav-links a[href="/login"]::before {
        content: "🔑";
    }
    
    .nav-links a[href="/register"]::before,
    .nav-links a[href*="register"]::before {
        content: "📝";
    }
    
    .nav-links a[id="logout-btn"]::before,
    .nav-links a[id="dynamic-logout-btn"]::before {
        content: "🚪";
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .button-group button {
        width: 100%;
    }
}