/* ========================================
   CSS Variables & Reset
   ======================================== */

:root {
    /* Colors - Dark theme */
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #1a1a1d;
    --bg-card: #141416;

    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-subtle: rgba(59, 130, 246, 0.1);

    --border: #27272a;
    --border-hover: #3f3f46;

    --success: #22c55e;
    --warning: #eab308;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Sizing */
    --container-max: 1200px;
    --container-padding: 1.5rem;

    /* Effects */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --transition: 150ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

img {
    max-width: 100%;
    height: auto;
}

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

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

ul {
    list-style: none;
}

/* ========================================
   Layout
   ======================================== */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ========================================
   Components
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.btn-full {
    width: 100%;
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo:hover {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
}

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

.nav-links .btn {
    padding: 0.5rem 1rem;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-content {
    max-width: 720px;
}

.hero-label {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-subtle);
    border-radius: 9999px;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-lg);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--border);
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

/* ========================================
   Section Styles
   ======================================== */

section {
    padding: var(--space-3xl) 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: var(--space-2xl);
}

/* ========================================
   Services Section
   ======================================== */

.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition);
}

.service-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--accent-subtle);
    color: var(--accent);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.service-card > p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-lg);
}

.service-features {
    margin-bottom: var(--space-lg);
}

.service-features li {
    position: relative;
    padding-left: var(--space-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

.service-price {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--success);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(34, 197, 94, 0.1);
    border-radius: var(--radius-sm);
}

/* ========================================
   Projects Section
   ======================================== */

.projects {
    background: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition);
}

.project-card:hover {
    border-color: var(--border-hover);
}

.project-card.featured {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-card) 100%);
    border-color: var(--accent);
}

.project-header {
    margin-bottom: var(--space-md);
}

.project-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    margin-bottom: var(--space-sm);
}

.project-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.project-card > p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-lg);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.project-tech span {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.project-highlights {
    border-top: 1px solid var(--border);
    padding-top: var(--space-lg);
}

.project-highlights li {
    position: relative;
    padding-left: var(--space-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
}

.project-highlights li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 600;
}

/* ========================================
   Contact Section
   ======================================== */

.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.contact-info > p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-method {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.contact-method:hover {
    color: var(--accent);
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-subtle);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .nav-links {
        gap: var(--space-lg);
    }

    .nav-links li:not(:last-child) {
        display: none;
    }

    .hero {
        padding: 6rem 0 3rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        text-align: left;
    }

    .stat {
        display: flex;
        align-items: baseline;
        gap: var(--space-md);
        text-align: left;
    }

    .services-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-card.featured {
        grid-column: 1;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }
}