/* ===== LAYOUT SYSTEM - GRID & FLEXBOX ARCHITECTURE ===== */

/* Container System */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.container-narrow {
    max-width: var(--content-max-width);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-6 { grid-template-columns: repeat(6, 1fr); }
.grid-cols-12 { grid-template-columns: repeat(12, 1fr); }

/* Auto-fit Grid (Responsive) */
.grid-auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-auto-fill {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Grid Gaps */
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Flexbox System */
.flex {
    display: flex;
}

.inline-flex {
    display: inline-flex;
}

/* Flex Direction */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-row-reverse { flex-direction: row-reverse; }
.flex-col-reverse { flex-direction: column-reverse; }

/* Flex Wrap */
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.flex-wrap-reverse { flex-wrap: wrap-reverse; }

/* Justify Content */
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

/* Align Items */
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-center { align-items: center; }
.items-baseline { align-items: baseline; }
.items-stretch { align-items: stretch; }

/* Align Self */
.self-auto { align-self: auto; }
.self-start { align-self: flex-start; }
.self-end { align-self: flex-end; }
.self-center { align-self: center; }
.self-stretch { align-self: stretch; }

/* Flex Grow/Shrink */
.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-initial { flex: 0 1 auto; }
.flex-none { flex: none; }
.flex-grow { flex-grow: 1; }
.flex-shrink { flex-shrink: 1; }

/* Section Layouts */
.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-sm { padding: var(--spacing-xl) 0; }
.section-lg { padding: calc(var(--spacing-3xl) * 1.5) 0; }

/* Navigation Layout */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    z-index: var(--z-fixed);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
    height: var(--navbar-height);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-links a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: var(--font-medium);
    transition: var(--transition-normal);
    position: relative;
    padding: var(--spacing-xs) var(--spacing-sm);
}

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

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 80%;
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: var(--spacing-xs);
    z-index: var(--z-fixed);
}

.mobile-menu span {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* Content Grids */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

/* Card Layouts */
.stat-card {
    background: var(--gradient-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition-normal);
    will-change: transform;
}

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

.stat-number {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--primary-color);
    display: block;
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.stat-label {
    color: var(--text-gray);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: var(--font-medium);
}

/* Project Cards */
.project-card {
    background: var(--gradient-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
    will-change: transform;
}

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

.project-image {
    height: 200px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-5xl);
    color: var(--text-dark);
    font-weight: var(--font-bold);
}

.project-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-title {
    font-size: var(--text-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.project-description {
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.project-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
}

.project-links .btn {
    flex: 1;
    font-size: var(--text-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
}

/* Tech Stack Layout */
.tech-stack {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

/* CTA Buttons Layout */
.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer Layout */
.footer {
    background: var(--darker-bg);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-3xl);
}

/* Logo Styling */
.logo {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

/* Section Titles */
.section-title {
    font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Section Description */
.section-description {
    text-align: center;
    color: var(--text-gray);
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Responsive Navigation */
@media (max-width: 768px) {
    .mobile-menu {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 80%;
        max-width: 300px;
        background: rgba(26, 26, 46, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 999;
        border-left: 2px solid var(--primary-color);
    }
    
    .nav-links.mobile-open {
        right: 0;
    }
    
    .nav-links a {
        font-size: 1.25rem;
        padding: 1rem;
        width: 80%;
        text-align: center;
        border-radius: 8px;
        transition: all 0.3s ease;
    }
    
    .nav-links a:hover {
        background: rgba(205, 127, 50, 0.1);
    }
}

/* Responsive Layouts */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .project-image {
        height: 160px;
        font-size: var(--text-4xl);
    }
    
    .project-links {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .project-links .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-number {
        font-size: var(--text-3xl);
    }
    
    .project-content {
        padding: var(--spacing-sm);
    }
    
    .project-image {
        height: 140px;
        font-size: var(--text-3xl);
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* Large Screens */
@media (min-width: 1600px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Performance Optimizations */
.navbar,
.stat-card,
.project-card {
    will-change: transform;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .stat-card,
    .project-card {
        border-width: 2px;
    }
    
    .nav-links a::after {
        height: 3px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .stat-card,
    .project-card,
    .nav-links a {
        transition: none;
    }
    
    .nav-links {
        transition: none;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .mobile-menu {
        display: none;
    }
    
    .section {
        padding: 2rem 0;
        page-break-inside: avoid;
    }
    
    .stat-card,
    .project-card {
        border: 2px solid #000;
        box-shadow: none;
        page-break-inside: avoid;
    }
    
    .project-image {
        background: #f0f0f0;
        color: #000;
    }
}