/* ============================================
   CSS Custom Properties & Variables
   ============================================ */
:root {
    /* Colors */
    --primary: #6366f1;
    --secondary: #ec4899;
    --accent: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);

    /* Dark Mode Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;

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

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Outfit', var(--font-primary);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgb(99 102 241 / 0.3);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: block;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    padding: var(--spacing-xl) 0;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    opacity: 0.1;
    animation: gradient-shift 15s ease infinite;
}

@keyframes gradient-shift {

    0%,
    100% {
        transform: translateX(0) translateY(0);
    }

    50% {
        transform: translateX(5%) translateY(5%);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-top: var(--spacing-sm);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

/* Hero Search */
.hero-search {
    margin-top: var(--spacing-xl);
}

.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: 1rem 3.5rem 1rem 1.5rem;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    background: rgba(255, 255, 255, 0.08);
}

.search-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gradient-primary);
    border: none;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-base);
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.05);
    box-shadow: var(--shadow-glow);
}

.search-suggestions {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    max-height: 400px;
    overflow-y: auto;
    display: none;
    box-shadow: var(--shadow-xl);
}

.search-suggestions.active {
    display: block;
}

.suggestion-item {
    padding: var(--spacing-sm);
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

.suggestion-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.suggestion-item:last-child {
    border-bottom: none;
}

/* ============================================
   Services Section
   ============================================ */
.services {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

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

.service-card {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.08);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--text-secondary);
}

/* ============================================
   Projects Section
   ============================================ */
.projects-section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Filters */
.filters {
    margin-bottom: var(--spacing-xl);
}

.filter-group {
    margin-bottom: var(--spacing-md);
}

.filter-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.chip {
    padding: 0.6rem 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 100px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    backdrop-filter: blur(4px);
}

.chip:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.2);
}

.chip.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

.chip-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

/* Tags */
.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    padding: 0.375rem 0.875rem;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.8125rem;
}

.tag:hover {
    color: var(--text-primary);
    border-color: var(--tag-color, var(--primary));
}

.tag.active {
    background: var(--tag-color, var(--primary));
    color: white;
    border-color: transparent;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--bg-secondary);
}

.project-content {
    padding: var(--spacing-md);
}

.project-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    height: 2.8em;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    height: 3.6em;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.project-tag {
    padding: 0.25rem 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.project-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--success);
}

.project-badge {
    padding: 0.25rem 0.75rem;
    background: var(--gradient-secondary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* ============================================
   Loading & States
   ============================================ */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .nav-menu {
        gap: var(--spacing-sm);
    }

    .filter-chips,
    .filter-tags {
        justify-content: center;
    }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.fade-in {
    animation: fadeIn var(--transition-slow) ease-out;
}