:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --glass-bg: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --transition: all 0.3s ease;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    margin: 0;
    line-height: 1.6;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-primary);
    margin-bottom: 0.5em;
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

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

code {
    background-color: var(--bg-tertiary);
    color: var(--accent);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
}

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

/* Navigation */
.navbar-premium {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link-premium {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
}

.nav-link-premium:hover,
.nav-link-premium.active {
    color: var(--accent);
}



.nav-logo-img {
    height: 80px;
    object-fit: contain;
    transition: var(--transition);
}

.nav-logo-img:hover {
    transform: scale(1.05);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

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

/* Hero Section */
.hero-section {
    position: relative;
    padding: 5rem 2rem;
    text-align: center;
    background: radial-gradient(circle at top right, #1e293b, #0f172a);
    overflow: hidden;
    margin-bottom: 4rem;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
}

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

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--accent);
    color: #0f172a;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.3);
}

.cta-button:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(56, 189, 248, 0.5);
    color: #0f172a;
    /* Ensure text remains legible */
}

/* Cards Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    object-fit: contain;
}

.tech-stack {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin: 3rem 0;
    opacity: 0.7;
}

.tech-icon {
    height: 48px;
    transition: var(--transition);
}

.tech-icon:hover {
    transform: scale(1.1);
    opacity: 1;
}

/* Utility */
.section-spacer {
    height: 4rem;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .navbar-premium {
        padding: 1rem;
    }
}

/* Mobile Menu Logic */
@media (max-width: 768px) {
    .nav-menu-container.expanded {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        padding: 1rem;
        border-bottom: 1px solid var(--glass-border);
        box-shadow: var(--shadow-lg);
        animation: slideDown 0.3s ease-out;
    }

    .nav-menu-container.expanded .nav-links {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
    }

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

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

/* Form Styles */
.contact-form-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

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

.form-control-premium {
    background: var(--bg-primary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 0.8rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition);
    width: 100%;
    box-sizing: border-box;
}

.form-control-premium:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.form-control-premium::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
}