/* assets/css/style.css */

/* ===== BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --background: #ffffff;
    --surface: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2rem;
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

/* ===== LAYOUT ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ===== HEADER & NAVIGATION ===== */
header {
    background: var(--background);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

.logo a:hover {
    transform: translateY(-2px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
    background: var(--surface);
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-menu a:hover::before {
    width: 80%;
}

/* ===== HERO SECTION ===== */
.hero {
    text-align: center;
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--surface) 0%, var(--background) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: slideUp 0.8s ease-out;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    animation: slideUp 0.8s ease-out 0.2s both;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== GRID LAYOUTS ===== */
.categories-grid,
.images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 2rem 0;
}

/* ===== CATEGORY CARDS ===== */
.category-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.5s;
}

.category-card:hover::before {
    left: 100%;
}

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

.category-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

.category-card span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.category-card:hover h3 {
    color: var(--primary-color);
}

/* ===== IMAGE CARDS ===== */
.image-card {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border);
    animation: fadeIn 0.6s ease-out;
}

.image-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

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

.image-info {
    padding: 1rem;
}

.image-info h3 {
    font-size: 1rem;
    margin-bottom: 0;
    color: var(--text-primary);
    line-height: 1.4;
}

/* ===== IMAGE DETAIL PAGE ===== */
.image-detail {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 3rem;
    padding: 2rem 0;
    align-items: start;
}

.image-container {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.image-container img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.image-container:hover img {
    transform: scale(1.02);
}

.image-info h1 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--surface);
    border-radius: var(--radius);
    border-left: 4px solid var(--primary-color);
}

/* ===== PURCHASE SECTION ===== */
.purchase-section {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.license-options {
    display: grid;
    gap: 1rem;
}

.license-option {
    background: var(--background);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 2px solid transparent;
    transition: var(--transition);
    text-align: center;
}

.license-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.license-option h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 1rem 0;
}

.buy-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    position: relative;
    overflow: hidden;
}

.buy-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.buy-btn:hover::before {
    left: 100%;
}

.buy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

/* ===== KEYWORDS ===== */
.keywords {
    margin-top: 2rem;
}

.keywords-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.keyword-tag {
    background: var(--surface);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.keyword-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

/* ===== SECTIONS ===== */
section {
    padding: 3rem 0;
    position: relative;
}

.popular-categories,
.latest-images {
    position: relative;
}

.category-header {
    text-align: center;
    padding: 2rem 0;
    background: linear-gradient(135deg, var(--surface) 0%, var(--background) 100%);
    margin-bottom: 2rem;
}

/* ===== FOOTER ===== */
footer {
    background: var(--text-primary);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* ===== LOADING ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.image-card {
    animation: fadeIn 0.6s ease-out;
}

.image-card:nth-child(odd) {
    animation-delay: 0.1s;
}

.image-card:nth-child(even) {
    animation-delay: 0.2s;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .categories-grid,
    .images-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }
    
    .image-detail {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .categories-grid,
    .images-grid {
        grid-template-columns: 1fr;
    }
    
    nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        gap: 0.5rem;
    }
}

/* ===== UTILITY CLASSES ===== */
.text-center {
    text-align: center;
}

.mb-2 {
    margin-bottom: 2rem;
}

.mt-2 {
    margin-top: 2rem;
}

.fade-in {
    animation: fadeIn 0.8s ease-out;
}

/* ===== SCROLL ANIMATIONS ===== */
@media (prefers-reduced-motion: no-preference) {
    .image-card,
    .category-card {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }
    
    .image-card.in-view,
    .category-card.in-view {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== SCROLLBAR STYLING ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ===== FOCUS STATES ===== */
a:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    .nav-menu,
    .buy-btn,
    footer {
        display: none;
    }
    
    .image-card {
        break-inside: avoid;
    }
}