:root {
    --bg-dark: #0a0a0a;
    --bg-card: #141414;
    --bg-card-hover: #1a1a1a;
    --bg-input: #1a1a1a;
    --text-white: #ffffff;
    --text-muted: #888888;
    --text-light: #cccccc;
    --accent-orange: #eb7d27;
    --accent-purple: #8532d1;
    --accent-green: #10b981;
    --border-color: #333333;
    --gradient-purple: linear-gradient(135deg, #8532d1 0%, #6b28a8 100%);
    --gradient-green: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-orange: linear-gradient(135deg, #eb7d27 0%, #d97706 100%);
}

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

body.dark-theme {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-white);
    line-height: 1.6;
}

.dark-theme a {
    color: var(--accent-purple);
    text-decoration: none;
}

.dark-theme a:hover {
    color: var(--accent-orange);
}

.dark-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
}

.dark-navbar img {
    height: 36px;
    filter: brightness(0) invert(1);
}

.dark-navbar-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.dark-navbar-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.dark-navbar-links a:hover {
    color: var(--text-white);
}

.dark-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: transform 0.2s, box-shadow 0.2s;
}

.dark-btn-primary {
    background: var(--accent-purple);
    color: white;
}

.dark-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(133, 50, 209, 0.3);
}

.dark-btn-green {
    background: var(--accent-green);
    color: white;
}

.dark-btn-green:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
}

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

.dark-btn-outline:hover {
    border-color: var(--text-white);
    background: rgba(255,255,255,0.05);
}

.dark-btn-nav {
    background: var(--accent-purple);
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
}

.dark-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid rgba(255,255,255,0.05);
}

.dark-card-hover:hover {
    background: var(--bg-card-hover);
    transform: translateY(-3px);
}

.dark-input {
    width: 100%;
    padding: 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-white);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.dark-input:focus {
    outline: none;
    border-color: var(--accent-purple);
}

.dark-input::placeholder {
    color: var(--text-muted);
}

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

.dark-section {
    padding: 6rem 2rem;
}

.dark-container {
    max-width: 1200px;
    margin: 0 auto;
}

.dark-section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.dark-section-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-purple);
    margin-bottom: 1rem;
}

.dark-section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.dark-section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.dark-footer {
    background: var(--bg-dark);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid #1a1a1a;
}

.dark-footer-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.dark-footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
}

.dark-footer-links a:hover {
    color: var(--text-white);
}

.dark-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.dark-hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-white);
    border-radius: 2px;
}

.dark-mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    padding: 1rem;
    border-bottom: 1px solid #222;
    z-index: 99;
}

.dark-mobile-menu.active {
    display: block;
}

.dark-mobile-menu a {
    display: block;
    padding: 1rem;
    text-decoration: none;
    color: var(--text-muted);
    border-bottom: 1px solid #1a1a1a;
}

.dark-alert {
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
}

.dark-alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.dark-alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.dark-grid {
    display: grid;
    gap: 2rem;
}

.dark-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.dark-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.dark-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .dark-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .dark-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .dark-navbar {
        padding: 1rem 1.5rem;
    }
    .dark-navbar-links {
        display: none;
    }
    .dark-hamburger {
        display: flex;
    }
    .dark-section {
        padding: 4rem 1.5rem;
    }
    .dark-section-title {
        font-size: 2rem;
    }
    .dark-grid-2,
    .dark-grid-3,
    .dark-grid-4 {
        grid-template-columns: 1fr;
    }
}