/* ===================================
   Nexo-Agents - Enterprise AI Theme
   Modern, Formal, Non-Commercial
   =================================== */

/* === CSS Variables === */
:root {
    /* Colors - AI Theme (Indigo/Purple) */
    --color-bg: #0a0a0f;
    --color-surface: #1a1a24;
    --color-surface-hover: #252532;
    --color-border: #2a2a3a;

    --color-primary: #4f46e5;      /* indigo-600 */
    --color-primary-hover: #4338ca; /* indigo-700 */
    --color-secondary: #8b5cf6;     /* purple-500 */
    --color-accent: #06b6d4;        /* cyan-500 */
    --color-success: #10b981;       /* green-500 */

    --color-text: #e5e7eb;          /* gray-200 */
    --color-text-muted: #9ca3af;    /* gray-400 */
    --color-text-dimmed: #6b7280;   /* gray-500 */

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 50%, #06b6d4 100%);
    --gradient-orb: radial-gradient(circle, rgba(79,70,229,0.15) 0%, transparent 70%);

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* === Background Animation === */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-orb);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139,92,246,0.15) 0%, transparent 70%);
    top: 50%;
    right: -150px;
    animation-delay: 7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(6,182,212,0.12) 0%, transparent 70%);
    bottom: -100px;
    left: 50%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: var(--spacing-sm); }

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

a:hover { color: var(--color-secondary); }

code {
    font-family: var(--font-mono);
    background: rgba(79, 70, 229, 0.1);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

/* === Container === */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.25rem;
    font-weight: 700;
}

.brand-icon {
    width: 32px;
    height: 32px;
    stroke: var(--color-primary);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-text-muted);
    font-weight: 500;
    transition: color var(--transition-base);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-base);
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(79, 70, 229, 0.1);
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid rgba(79, 70, 229, 0.2);
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

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

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

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

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

.stat-label {
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.stat-context {
    color: var(--color-text-dimmed);
    font-size: 0.75rem;
}

.stat-footnote {
    font-size: 0.75rem;
    color: var(--color-text-dimmed);
    margin-bottom: var(--spacing-xl);
    font-style: italic;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* === Code Window === */
.hero-visual {
    position: relative;
}

.code-window {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.window-header {
    background: rgba(26, 26, 36, 0.8);
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.window-dots {
    display: flex;
    gap: 6px;
}

.window-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-border);
}

.window-dots span:nth-child(1) { background: #ff5f56; }
.window-dots span:nth-child(2) { background: #ffbd2e; }
.window-dots span:nth-child(3) { background: #27c93f; }

.window-title {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.window-content {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    overflow-x: auto;
}

.code-keyword { color: var(--color-primary); }
.code-string { color: var(--color-success); }
.code-comment { color: var(--color-text-dimmed); }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    text-decoration: none;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

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

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

.btn-outline:hover {
    border-color: var(--color-primary);
    background: rgba(79, 70, 229, 0.1);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* === Sections === */
section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* === Value Section === */
.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.value-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

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

.value-icon {
    width: 56px;
    height: 56px;
    background: rgba(79, 70, 229, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.value-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--color-primary);
}

.value-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.value-card p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.value-card ul {
    list-style: none;
    padding: 0;
}

.value-card ul li {
    color: var(--color-text-muted);
    padding-left: var(--spacing-md);
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.value-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

/* === Command Categories === */
.commands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.command-category {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

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

.category-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.command-category h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.category-count {
    color: var(--color-primary);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.command-category p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.search-container {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

#commandSearch {
    width: 100%;
    max-width: 400px;
    padding: 12px 20px;
    margin: 0 auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-surface);
    color: var(--color-text);
    font-size: 1rem;
}

.category-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
}

.category-tags span {
    background: rgba(79, 70, 229, 0.1);
    color: var(--color-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(79, 70, 229, 0.2);
}

/* === Architecture Section === */
.architecture-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.architecture-diagram {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.arch-node {
    background: rgba(79, 70, 229, 0.05);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    width: 100%;
    transition: all var(--transition-base);
}

.arch-node:hover {
    border-color: var(--color-primary);
    background: rgba(79, 70, 229, 0.1);
}

.arch-node.highlight {
    border-color: var(--color-primary);
    background: rgba(79, 70, 229, 0.15);
}

.node-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.node-label {
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.node-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.arch-arrow {
    color: var(--color-primary);
    font-size: 1.5rem;
}

.architecture-details h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
}

.decision-block {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.decision-block h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.decision-block ul {
    list-style: none;
    padding: 0;
}

.decision-block ul li {
    color: var(--color-text-muted);
    padding-left: var(--spacing-md);
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.decision-block ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.tradeoff-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.tradeoff-table td {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
}

.tradeoff-table td.con {
    background: rgba(239, 68, 68, 0.05);
    border-left: 3px solid #ef4444;
}

.tradeoff-table td.pro {
    background: rgba(16, 185, 129, 0.05);
    border-left: 3px solid var(--color-success);
}

/* === Integration Section === */
.integration-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.integration-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

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

.integration-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.integration-card p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tech-stack span {
    background: rgba(79, 70, 229, 0.1);
    color: var(--color-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(79, 70, 229, 0.2);
}

/* === CTA Section === */
.cta {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.cta-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.cta-stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.cta-stat-icon {
    font-size: 1.25rem;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-description {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.footer-links ul {
    list-style: none;
    padding: 0;
}

.footer-links ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-links ul li a {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    transition: color var(--transition-base);
}

.footer-links ul li a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-dimmed);
    font-size: 0.875rem;
}

.footer-tech {
    margin-top: var(--spacing-xs);
    color: var(--color-text-dimmed);
}

.disclaimer {
    font-size: 0.75rem;
    color: var(--color-text-dimmed);
    margin-top: var(--spacing-sm);
    font-style: italic;
}

/* === Responsive Design === */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        justify-content: center;
    }

    .architecture-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-toggle {
        display: flex;
    }

    .value-grid,
    .commands-grid,
    .integration-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

.code-window {
    position: relative;
}

.copy-button {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: #2a2a2a;
    color: #fff;
    border: 1px solid #444;
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s;
}

.code-window:hover .copy-button {
    opacity: 1;
}