/* ============================================
   MITCHI.XYZ - Design System
   Light mode, clean, technical, futuristic
   ============================================ */

:root {
    /* Colors */
    --color-bg: #fafafa;
    --color-bg-elevated: #ffffff;
    --color-bg-subtle: #f5f5f5;
    --color-border: #e5e5e5;
    --color-border-subtle: #ebebeb;
    
    --color-text-primary: #0a0a0a;
    --color-text-secondary: #525252;
    --color-text-tertiary: #a3a3a3;
    
    --color-accent: #6366f1;
    --color-accent-hover: #4f46e5;
    --color-accent-subtle: #eef2ff;
    
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-subtle: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ============================================
   Reset & Base
   ============================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

/* Subtle grain texture overlay */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    z-index: 1000;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

a {
    color: inherit;
    text-decoration: none;
}

/* ============================================
   Navbar
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) var(--space-xl);
    background: rgba(250, 250, 250, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.125rem;
}

.logo-icon {
    font-size: 1.25rem;
    color: var(--color-accent);
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4xl) var(--space-xl);
    padding-top: calc(var(--space-4xl) + 60px);
    max-width: 1200px;
    margin: 0 auto;
    gap: var(--space-3xl);
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-accent-subtle);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
}

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

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 480px;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: var(--color-text-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

/* Hero Visual */
.hero-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 400px;
}

.floating-cards {
    position: relative;
    width: 300px;
    height: 300px;
}

.floating-card {
    position: absolute;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.floating-card .card-icon {
    font-size: 2rem;
}

.floating-card .card-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.card-1 {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.card-2 {
    bottom: 20%;
    left: 0;
    animation-delay: -2s;
}

.card-3 {
    bottom: 20%;
    right: 0;
    animation-delay: -4s;
}

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

.card-2, .card-3 {
    animation-name: float-simple;
}

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

/* ============================================
   Tools Section
   ============================================ */

.tools-section {
    padding: var(--space-4xl) var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.tool-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.tool-status {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-xs) var(--space-sm);
    background: var(--gradient-subtle);
    color: var(--color-accent);
    border-radius: var(--radius-full);
}

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

.tool-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.tool-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.tool-card.placeholder {
    border-style: dashed;
    background: var(--color-bg-subtle);
}

.tool-card.placeholder .tool-icon {
    color: var(--color-text-tertiary);
}

/* ============================================
   About Section
   ============================================ */

.about-section {
    padding: var(--space-4xl) var(--space-xl);
    background: var(--color-bg-subtle);
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about-content .section-label {
    text-align: left;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: var(--space-lg);
}

.about-text {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.about-text:last-child {
    margin-bottom: 0;
}

/* Code Block */
.code-block {
    background: var(--color-text-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-header {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.05);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red { background: #ff5f57; }
.code-dot.yellow { background: #febc2e; }
.code-dot.green { background: #28c840; }

.code-content {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.7;
    color: #e5e5e5;
    overflow-x: auto;
}

.code-keyword { color: #c792ea; }
.code-string { color: #c3e88d; }

/* ============================================
   Contact Section
   ============================================ */

.contact-section {
    padding: var(--space-4xl) var(--space-xl);
    text-align: center;
}

.contact-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.contact-email {
    display: inline-block;
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: opacity var(--transition-fast);
}

.contact-email:hover {
    opacity: 0.8;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
}

.footer-text {
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: calc(var(--space-3xl) + 80px);
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-visual {
        min-height: 300px;
    }
    
    .about-container {
        grid-template-columns: 1fr;
    }
    
    .about-content .section-label,
    .about-content .section-title {
        text-align: center;
    }
    
    .about-text {
        text-align: center;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
    }
    
    .floating-cards {
        transform: scale(0.8);
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}