/* ========================================
   TSNUG Landing Page - Premium Design
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary-hue: 250;
    --primary: hsl(var(--primary-hue), 100%, 65%);
    --primary-dark: hsl(var(--primary-hue), 100%, 55%);
    --primary-light: hsl(var(--primary-hue), 100%, 75%);
    
    --accent: hsl(180, 100%, 50%);
    --accent-glow: hsl(180, 100%, 60%);
    
    --bg-dark: hsl(230, 25%, 8%);
    --bg-card: hsl(230, 20%, 12%);
    --bg-card-hover: hsl(230, 20%, 15%);
    --bg-elevated: hsl(230, 20%, 16%);
    
    --text-primary: hsl(0, 0%, 98%);
    --text-secondary: hsl(230, 15%, 70%);
    --text-muted: hsl(230, 10%, 50%);
    
    --border-color: hsla(230, 20%, 40%, 0.2);
    --border-glow: hsla(var(--primary-hue), 100%, 65%, 0.3);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, hsl(250, 100%, 65%) 0%, hsl(280, 100%, 60%) 50%, hsl(320, 100%, 55%) 100%);
    --gradient-card-app: linear-gradient(135deg, hsl(280, 80%, 20%) 0%, hsl(250, 60%, 15%) 100%);
    --gradient-card-web: linear-gradient(135deg, hsl(200, 80%, 20%) 0%, hsl(220, 60%, 15%) 100%);
    --gradient-card-oss: linear-gradient(135deg, hsl(160, 80%, 20%) 0%, hsl(180, 60%, 15%) 100%);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

img {
    max-width: 100%;
    display: block;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-sm) 0;
    background: hsla(230, 25%, 8%, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.8rem;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.nav-links a:not(.btn-hire):hover {
    color: var(--text-primary);
}

.nav-links a:not(.btn-hire)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-links a:not(.btn-hire):hover::after {
    width: 100%;
}

.btn-hire {
    padding: 0.6rem 1.2rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    color: white !important;
    font-weight: 600;
}

.btn-hire:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px hsla(var(--primary-hue), 100%, 50%, 0.3);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 4rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    left: -20%;
    width: 140%;
    height: 140%;
    background: radial-gradient(ellipse at 30% 20%, hsla(var(--primary-hue), 100%, 50%, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 60%, hsla(280, 100%, 50%, 0.1) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 100%, hsla(320, 100%, 50%, 0.08) 0%, transparent 40%);
}

.floating-shapes {
    position: absolute;
    inset: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    animation: float 20s infinite;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: hsla(var(--primary-hue), 100%, 50%, 0.1);
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: hsla(180, 100%, 50%, 0.08);
    bottom: 20%;
    left: 5%;
    animation-delay: -5s;
}

.shape-3 {
    width: 250px;
    height: 250px;
    background: hsla(320, 100%, 50%, 0.1);
    top: 50%;
    left: 40%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(30px, -30px) rotate(5deg); }
    50% { transform: translate(-20px, 20px) rotate(-5deg); }
    75% { transform: translate(20px, 30px) rotate(3deg); }
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    background: hsla(var(--primary-hue), 100%, 50%, 0.1);
    border: 1px solid hsla(var(--primary-hue), 100%, 50%, 0.3);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary-light);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease;
}

.badge-icon {
    font-size: 1.1rem;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.6s ease 0.1s both;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-description strong {
    color: var(--text-primary);
}

.hero-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
    animation: fadeInUp 0.6s ease 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: none;
    transition: var(--transition-base);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px hsla(var(--primary-hue), 100%, 50%, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px hsla(var(--primary-hue), 100%, 50%, 0.4);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: hsla(var(--primary-hue), 100%, 50%, 0.1);
}

.btn-light {
    background: white;
    color: hsl(230, 25%, 15%);
    font-weight: 600;
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px hsla(0, 0%, 100%, 0.2);
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    animation: fadeInUp 0.6s ease 0.4s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

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

/* ========================================
   Section Styles
   ======================================== */
section {
    padding: var(--space-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: hsla(var(--primary-hue), 100%, 50%, 0.1);
    border: 1px solid hsla(var(--primary-hue), 100%, 50%, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--space-sm);
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    background: linear-gradient(180deg, transparent 0%, hsla(230, 25%, 10%, 0.5) 50%, transparent 100%);
}

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

.feature-card {
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-glow);
    box-shadow: 0 20px 40px hsla(0, 0%, 0%, 0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: hsla(var(--primary-hue), 100%, 50%, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    font-size: 1.8rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   Categories Section
   ======================================== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-lg);
}

.category-card {
    position: relative;
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-base);
    display: block;
}

.category-bg {
    position: absolute;
    inset: 0;
    transition: var(--transition-base);
}

.category-app .category-bg {
    background: var(--gradient-card-app);
    border: 1px solid hsla(280, 80%, 50%, 0.2);
}

.category-web .category-bg {
    background: var(--gradient-card-web);
    border: 1px solid hsla(200, 80%, 50%, 0.2);
}

.category-oss .category-bg {
    background: var(--gradient-card-oss);
    border: 1px solid hsla(160, 80%, 50%, 0.2);
}

.category-card:hover {
    transform: translateY(-8px);
}

.category-card:hover .category-bg {
    border-color: hsla(var(--primary-hue), 80%, 50%, 0.4);
    box-shadow: 0 25px 50px hsla(0, 0%, 0%, 0.4);
}

.category-content {
    position: relative;
    z-index: 1;
}

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

.category-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: 0.95rem;
}

.category-examples {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.example-tag {
    padding: 0.3rem 0.8rem;
    background: hsla(0, 0%, 100%, 0.1);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.category-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 600;
    color: var(--primary-light);
}

.category-link svg {
    transition: var(--transition-base);
}

.category-card:hover .category-link svg {
    transform: translateX(5px);
}

/* ========================================
   Popular Projects Section
   ======================================== */
.popular {
    background: linear-gradient(180deg, transparent 0%, hsla(230, 25%, 6%, 0.8) 50%, transparent 100%);
}

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

.project-card {
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    display: block;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 15px 35px hsla(0, 0%, 0%, 0.3);
}

.project-badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    background: var(--gradient-primary);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-sm);
}

.project-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.popular-cta {
    text-align: center;
    margin-top: var(--space-xl);
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    padding: var(--space-xl) 0;
}

.cta-card {
    position: relative;
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    overflow: hidden;
    text-align: center;
}

.cta-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
}

.cta-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: var(--space-sm);
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 500px;
    margin: 0 auto var(--space-lg);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--space-2xl) 0 var(--space-lg);
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: var(--text-secondary);
    max-width: 400px;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--space-2xl);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-xs);
}

.footer-column a:hover {
    color: var(--primary-light);
}

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

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 6rem 0 3rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--space-md);
    }
    
    .stat-divider {
        display: none;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-links {
        gap: var(--space-xl);
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .features-grid,
    .popular-grid {
        grid-template-columns: 1fr;
    }
}