:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --accent: #0984e3;
    --accent-hover: #0761a8;
    --card-bg: #ffffff;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --radius: 16px;
    --border: #e0e0e0;
    --gradient: linear-gradient(135deg, #0984e3, #6c5ce7);
    --success: #00b894;
    --danger: #d63031;
    --hero-bg: linear-gradient(135deg, #dfe6e9, #b2bec3);
}

[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --accent: #74b9ff;
    --accent-hover: #0984e3;
    --card-bg: #1e2a3a;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --border: #2d3436;
    --hero-bg: linear-gradient(135deg, #0f3460, #16213e);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    text-decoration: none;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
}

.nav a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle, .hamburger {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.hamburger {
    display: none;
}

/* Hero */
.hero {
    background: var(--hero-bg);
    padding: 80px 0;
    text-align: center;
    border-radius: 0 0 var(--radius) var(--radius);
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 30px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(9, 132, 227, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(9, 132, 227, 0.4);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

/* Search & Filter */
.search-filter {
    padding: 30px 0;
}

.filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    justify-content: center;
}

.filter-form input, .filter-form select {
    padding: 12px 15px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 1rem;
    min-width: 150px;
    transition: border-color 0.3s;
}

.filter-form input:focus, .filter-form select:focus {
    border-color: var(--accent);
    outline: none;
}

/* Projects */
.projects {
    padding: 50px 0;
}

.projects h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
}

.count {
    font-size: 1rem;
    color: var(--text-secondary);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.project-card:hover .card-image img {
    transform: scale(1.05);
}

.price {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.card-body {
    padding: 20px;
}

.card-body h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.card-body p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.tag {
    background: var(--bg-secondary);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    color: var(--accent);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
}

.rating {
    color: #f39c12;
}

.no-results {
    text-align: center;
    padding: 50px;
    color: var(--text-secondary);
}

/* Stats */
.stats-section {
    background: var(--bg-secondary);
    padding: 60px 0;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.stat-item {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Testimonials */
.testimonials {
    padding: 60px 0;
    text-align: center;
}

.testimonial-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.testimonial-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    font-style: italic;
}

.testimonial-card span {
    display: block;
    margin-top: 15px;
    color: var(--accent);
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 50px 0 20px;
    margin-top: 50px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3, .footer-section h4 {
    margin-bottom: 15px;
}

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

.footer-section a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.3s;
}

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

.social-share a {
    display: inline-block;
    margin-right: 15px;
    padding: 8px 15px;
    background: var(--card-bg);
    border-radius: 20px;
    margin-top: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
}

/* Admin */
.admin-main {
    padding: 50px 0;
    min-height: 60vh;
}

.admin-login, .admin-dashboard {
    max-width: 800px;
    margin: 0 auto;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 500px;
    margin: 20px auto;
}

.form input, .form textarea {
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-primary);
}

.admin-stats {
    display: flex;
    gap: 30px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.admin-stats p {
    background: var(--card-bg);
    padding: 15px 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.admin-actions {
    margin: 30px 0;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.admin-projects {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.admin-project-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.admin-project-card img {
    width: 100px;
    height: 70px;
    object-fit: cover;
    border-radius: 8px;
}

.admin-project-card .info {
    flex: 1;
}

.admin-project-card .btn {
    padding: 8px 20px;
}

.error {
    color: var(--danger);
    background: #ffeaa7;
    padding: 10px;
    border-radius: 8px;
}

.success {
    color: var(--success);
    background: #dfe6e9;
    padding: 10px;
    border-radius: 8px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--card-bg);
        padding: 20px;
        box-shadow: var(--shadow);
    }

    .nav.active {
        display: block;
    }

    .nav ul {
        flex-direction: column;
        gap: 15px;
    }

    .hamburger {
        display: block;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .filter-form {
        flex-direction: column;
    }

    .filter-form input, .filter-form select {
        width: 100%;
    }

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

    .admin-project-card {
        flex-direction: column;
        text-align: center;
    }
}