:root {
    --bg-body: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-hover: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --border: #334155;
    --nav-height: 80px;
    --container-width: 1200px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--accent);
    color: #0f172a;
}

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

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

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.section-padding {
    padding: 80px 0;
}

.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-4 { margin-bottom: 4rem; }

/* Header */
.header {
    height: var(--nav-height);
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.5px;
}

.nav-desktop ul {
    display: flex;
    gap: 32px;
}

.nav-desktop a {
    color: var(--text-muted);
    font-weight: 500;
}

.nav-desktop a:hover, .nav-desktop a.active {
    color: var(--accent);
}

/* Hero */
.hero {
    margin-top: var(--nav-height);
    padding: 120px 0;
    background: radial-gradient(circle at top right, rgba(56, 189, 248, 0.1), transparent 40%),
                radial-gradient(circle at bottom left, rgba(56, 189, 248, 0.05), transparent 40%);
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
}

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

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--bg-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-muted);
}

/* Contact Strip */
.contact-strip {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.contact-info-grid {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 32px;
    text-align: center;
}

.contact-item h4 {
    color: var(--accent);
    margin-bottom: 8px;
}

/* Forms */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-input, .form-textarea {
    width: 100%;
    padding: 12px;
    background: var(--bg-body);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* Footer */
.footer {
    background: var(--bg-surface);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    margin-bottom: 20px;
    color: var(--text-main);
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col a {
    color: var(--text-muted);
}

.footer-col a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Mobile */
@media (max-width: 768px) {
    .header .container {
        padding: 0 16px;
    }
    
    .nav-desktop {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .contact-info-grid {
        flex-direction: column;
        align-items: center;
    }
}