/* MTMesh Modern Design System */

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

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Colors - Modern Neutral Palette */
    --color-primary: #1a1a1a;
    --color-primary-light: #2d2d2d;
    --color-secondary: #67EA94;
    --color-accent: #2ce26a;
    --color-text: #1a1a1a;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-background: #ffffff;
    --color-surface: #f8f9fa;
    --color-surface-hover: #e9ecef;
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    
    /* Success/Error Colors */
    --color-success: #28a745;
    --color-error: #dc3545;
    --color-warning: #ffc107;
    
    /* Typography */
    --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    
    /* Font Sizes - Fluid Typography */
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
    --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
    --font-size-3xl: clamp(2rem, 1.7rem + 1.5vw, 2.75rem);
    --font-size-4xl: clamp(2.75rem, 2.3rem + 2.25vw, 3.5rem);
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing Scale */
    --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;
    --space-5xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Animation */
    --transition-fast: 150ms ease-out;
    --transition-normal: 250ms ease-out;
    --transition-slow: 350ms ease-out;
    
    /* Layout */
    --container-max-width: 1200px;
    --content-max-width: 900px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #ffffff;
        --color-primary-light: #e0e0e0;
        --color-text: #ffffff;
        --color-text-light: #b0b0b0;
        --color-text-muted: #808080;
        --color-background: #0f0f0f;
        --color-surface: #1a1a1a;
        --color-surface-hover: #2d2d2d;
        --color-border: #333333;
        --color-border-light: #262626;
    }
}

/* Base Styles */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography System */
.h1, h1 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-lg);
}

.h2, h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
}

.h3, h3 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-normal);
    margin-bottom: var(--space-md);
}

.h4, h4 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    margin-bottom: var(--space-sm);
}

p {
    margin-bottom: var(--space-md);
    color: var(--color-text-light);
}

.text-large {
    font-size: var(--font-size-lg);
}

.text-small {
    font-size: var(--font-size-sm);
}

.text-xs {
    font-size: var(--font-size-xs);
}

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

.container-content {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

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

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Button System */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--transition-normal);
    user-select: none;
}

.btn:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
    background-color: var(--color-surface);
    border-color: var(--color-primary);
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
}

/* Card System */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-normal);
}

.card:hover {
    background-color: var(--color-surface-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-sm);
}

.card-content {
    color: var(--color-text-light);
}

/* Header Styles */
.header {
    background-color: var(--color-secondary);
    padding: var(--space-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.logo {
    height: 60px;
    width: auto;
    transition: transform var(--transition-normal);
}

.logo:hover {
    transform: scale(1.05);
}

/* Navigation Styles */
.nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .nav {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

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

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
}

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

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

.nav-social a {
    display: flex;
    align-items: center;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.nav-social a:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.3) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-md);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-lg);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-2xl);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Section Styles */
.section {
    padding: var(--space-4xl) 0;
}

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

.section-content {
    max-width: var(--content-max-width);
    margin: 0 auto;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-background);
}

.table th,
.table td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

.table th {
    background-color: var(--color-surface);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

.table tbody tr:hover {
    background-color: var(--color-surface);
}

/* Footer */
.footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0;
    margin-top: var(--space-4xl);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.footer a {
    color: var(--color-text-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: var(--font-weight-bold); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-medium { font-weight: var(--font-weight-medium); }

.text-muted { color: var(--color-text-muted); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* Responsive Utilities */
@media (max-width: 767px) {
    .hide-mobile { display: none; }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-menu {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
}

@media (min-width: 768px) {
    .hide-desktop { display: none; }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up {
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Focus Management */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: var(--color-background);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}