:root {
    --bg-color: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-speed: 0.3s;
}

[data-theme="light"] {
    --bg-color: #f0f4f8;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --accent-color: #0284c7;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.05);
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

a:hover {
    color: var(--text-primary);
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 6rem 0;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all var(--transition-speed);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.navbar.scrolled {
    background: var(--glass-bg);
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.theme-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s, transform 0.3s;
    margin-left: 1rem;
    margin-right: auto;
}

.theme-btn:hover {
    color: var(--accent-color);
    transform: rotate(15deg);
}


/* Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Nav Links Base Styles */
.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}


.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all var(--transition-speed);
}

.nav-links a:hover,
.nav-links a.active {
    color: #fff;
    background: var(--accent-color);
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.typing-container {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    min-height: 1.6em;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: var(--accent-color);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.4);
    color: #fff;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed);
}

.hero-image:hover img {
    transform: scale(1.02) rotate(1deg);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-speed);
}

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

/* Contact/Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-control {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.1);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        gap: 1rem;
        background: var(--glass-bg);
        padding: 1rem;
        border-radius: 1rem;
        margin-top: 1rem;
        width: 100%;
        text-align: center;
        border: 1px solid var(--glass-border);
    }

    .nav-links.active {
        display: flex;
        animation: slideDown 0.3s ease-out;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav-content {
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .nav-content>.logo {
        flex: 1;
    }

    .nav-content>nav {
        width: 100%;
        order: 3;
    }
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}