/* 
  ARCSEC Tecnologia - Core Design System (CBDS)
  Implementation based on design-system.md
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    /* --- PRIMITIVE TOKENS --- */
    
    /* Colors Base */
    --primitive-color-neutral-0: #ffffff;
    --primitive-color-neutral-50: #fafafa;
    --primitive-color-neutral-100: #f5f5f5;
    --primitive-color-neutral-200: #e5e5e5;
    --primitive-color-neutral-300: #d4d4d4;
    --primitive-color-neutral-400: #a3a3a3;
    --primitive-color-neutral-500: #737373;
    --primitive-color-neutral-600: #525252;
    --primitive-color-neutral-700: #404040;
    --primitive-color-neutral-800: #262626;
    --primitive-color-neutral-900: #171717;
    --primitive-color-neutral-950: #0a0a0a;
    --primitive-color-neutral-1000: #050505;

    /* Brand Colors */
    --primitive-color-primary-500: #6366f1; /* Indigo */
    --primitive-color-secondary-500: #a855f7; /* Purple */
    --primitive-color-accent-500: #06b6d4; /* Cyan */
    
    /* Spacing Scale (8px base) */
    --primitive-space-1: 0.25rem; /* 4px */
    --primitive-space-2: 0.5rem;  /* 8px */
    --primitive-space-3: 0.75rem; /* 12px */
    --primitive-space-4: 1rem;    /* 16px */
    --primitive-space-6: 1.5rem;  /* 24px */
    --primitive-space-8: 2rem;    /* 32px */
    --primitive-space-12: 3rem;   /* 48px */
    --primitive-space-16: 4rem;   /* 64px */

    /* Radius */
    --primitive-radius-sm: 4px;
    --primitive-radius-md: 8px;
    --primitive-radius-lg: 12px;
    --primitive-radius-xl: 24px;
    --primitive-radius-full: 9999px;

    /* --- SEMANTIC TOKENS --- */

    /* Backgrounds */
    --surface-primary: var(--primitive-color-neutral-1000);
    --surface-secondary: var(--primitive-color-neutral-950);
    --surface-elevated: var(--primitive-color-neutral-900);
    --surface-glass: rgba(23, 23, 23, 0.7);
    --surface-glass-border: rgba(255, 255, 255, 0.1);

    /* Text */
    --color-text-primary: var(--primitive-color-neutral-50);
    --color-text-secondary: var(--primitive-color-neutral-400);
    --color-text-muted: var(--primitive-color-neutral-600);
    --color-text-on-interactive: var(--primitive-color-neutral-0);

    /* Interactive */
    --color-interactive-primary: var(--primitive-color-primary-500);
    --color-interactive-primary-hover: var(--primitive-color-secondary-500);
    --color-interactive-accent: var(--primitive-color-accent-500);
    
    /* Gradients */
    --brand-ai-gradient: linear-gradient(135deg, var(--primitive-color-primary-500), var(--primitive-color-secondary-500));
    --brand-ai-glow: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(168, 85, 247, 0.2));
    --surface-glass-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px -5px rgba(99, 102, 241, 0.5);
}

/* --- RESET & BASE --- */

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, .font-display {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* --- ATOMS --- */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--primitive-space-4);
}

.button-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--primitive-space-3) var(--primitive-space-8);
    background: var(--brand-ai-gradient);
    color: var(--color-text-on-interactive);
    border-radius: var(--primitive-radius-full);
    font-weight: 600;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-glow);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
}

.button-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 0 30px -5px rgba(168, 85, 247, 0.6);
}

.button-primary:active {
    transform: scale(0.98);
}

.button-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--primitive-space-3) var(--primitive-space-8);
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--surface-glass-border);
    border-radius: var(--primitive-radius-full);
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.button-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-interactive-primary);
}

.glass-card {
    background: var(--surface-glass);
    border: 1px solid var(--surface-glass-border);
    backdrop-filter: blur(20px);
    border-radius: var(--primitive-radius-lg);
    padding: var(--primitive-space-6);
    transition: all 0.3s ease;
}

.glass-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-4px);
}

.badge-ai {
    display: inline-block;
    padding: var(--primitive-space-1) var(--primitive-space-3);
    background: var(--brand-ai-glow);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--primitive-radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-interactive-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--primitive-space-2);
}

/* --- MOLECULES --- */

.section-header {
    text-align: center;
    margin-bottom: var(--primitive-space-12);
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: var(--primitive-space-2);
    background: linear-gradient(to right, #fff, #a3a3a3);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* --- ORGANISMS --- */

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--primitive-space-4) 0;
    background: rgba(5, 5, 5, 0.5);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--surface-glass-border);
    transition: padding 0.3s ease;
}

.navbar.scrolled {
    padding: var(--primitive-space-2) 0;
}

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

.nav-links {
    display: flex;
    gap: var(--primitive-space-6);
    align-items: center;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

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

.nav-link.highlight {
    color: var(--color-interactive-accent);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    filter: blur(80px);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: var(--primitive-space-4);
    background: linear-gradient(135deg, #fff 0%, #a855f7 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--primitive-space-8);
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: var(--primitive-space-4);
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(2, minmax(200px, auto));
    gap: var(--primitive-space-4);
    margin-top: var(--primitive-space-8);
}

.bento-item {
    position: relative;
    overflow: hidden;
}

.bento-item.ai-main {
    grid-column: span 8;
    grid-row: span 2;
}

.bento-item.secondary {
    grid-column: span 4;
}

.bento-item .content {
    position: relative;
    z-index: 2;
}

.bento-item .bg-icon {
    position: absolute;
    right: -20px;
    bottom: -20px;
    font-size: 8rem;
    opacity: 0.03;
    transform: rotate(-15deg);
}

/* AI Section Detail */
.ai-section {
    padding: var(--primitive-space-16) 0;
    position: relative;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--primitive-space-6);
    margin-top: var(--primitive-space-8);
}

/* Footer */
.footer {
    padding: var(--primitive-space-16) 0 var(--primitive-space-8);
    background: var(--surface-secondary);
    border-top: 1px solid var(--surface-glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--primitive-space-12);
    margin-bottom: var(--primitive-space-12);
}

.footer-logo img {
    margin-bottom: var(--primitive-space-4);
}

.footer h4 {
    margin-bottom: var(--primitive-space-6);
    font-size: 1.125rem;
}

.footer-links li {
    margin-bottom: var(--primitive-space-3);
}

.footer-links a {
    color: var(--color-text-secondary);
}

.footer-links a:hover {
    color: var(--color-interactive-primary);
    padding-left: var(--primitive-space-2);
}

.footer-bottom {
    padding-top: var(--primitive-space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* --- ANIMATIONS --- */

[data-aos] {
    transition-duration: 800ms;
}

.float-animation {
    animation: float 6s ease-in-out infinite;
}

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

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* --- RESPONSIVE --- */

@media (max-width: 992px) {
    .hero h1 { font-size: 3rem; }
    .bento-grid {
        grid-template-columns: repeat(1, 1fr);
    }
    .bento-item.ai-main, .bento-item.secondary {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero-actions { flex-direction: column; }
    .nav-links { display: none; } /* Add burger menu later if needed */
}