:root {
    --primary: #0a4a6e;
    --primary-light: #0ea5e9;
    --secondary: #10b981;
    --dark: #0f172a;
    --light: #f8fafc;
    --text: #334155;
    --text-light: #64748b;
    --border: #e2e8f0;
    --bg: #ffffff;
    --card-bg: #ffffff;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary: #38bdf8;
    --primary-light: #7dd3fc;
    --secondary: #34d399;
    --dark: #f8fafc;
    --light: #0f172a;
    --text: #e2e8f0;
    --text-light: #94a3b8;
    --border: #334155;
    --bg: #020617;
    --card-bg: #1e293b;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 5rem 0;
}

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}

header.scrolled {
    padding: 0.5rem 0;
    box-shadow: var(--shadow);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

nav ul {
    display: flex;
    gap: 2rem;
}

nav a {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text);
}

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

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

.theme-toggle {
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.25rem;
}

/* Hero */
.hero {
    padding-top: 10rem;
    padding-bottom: 8rem;
    background: linear-gradient(135deg, var(--bg) 0%, var(--border) 100%);
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    top: -10%;
    right: -10%;
    width: 40%;
    height: 60%;
    background: var(--primary);
    opacity: 0.05;
    border-radius: 50%;
    filter: blur(100px);
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

/* Footer */
footer {
    background: var(--light);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul li a {
    color: var(--text-light);
}

.footer-col ul li a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Responsiveness */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    nav {
        display: none; /* Mobile menu needed */
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}