/* ============================================
   CESTRUS.AI - Design System & Styles
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Black & White Theme */
    --color-black: #000000;
    --color-bg-primary: #0A0A0A;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1A1A1A;
    --color-white: #FFFFFF;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E5E5E5;
    --color-gray-300: #D4D4D4;
    --color-gray-400: #A3A3A3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;
    --font-size-7xl: 6rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-slower: 700ms ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Layout */
    --container-max: 1400px;
    --section-padding: clamp(4rem, 10vh, 8rem);
}

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

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 600;
    margin-bottom: var(--space-8);
    max-width: 800px;
}

.section-lead {
    font-size: clamp(var(--font-size-lg), 2vw, var(--font-size-xl));
    color: var(--color-gray-400);
    line-height: 1.7;
    max-width: 700px;
    margin-bottom: var(--space-10);
}

/* ============================================
   Layout
   ============================================ */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-8);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-6);
    }
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-16);
}

@media (max-width: 1024px) {
    .section-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
}

.section-header {
    margin-bottom: var(--space-16);
}

.section-label {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.label-number {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-500);
    font-variant-numeric: tabular-nums;
}

.label-text {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-400);
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-6) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-gray-800);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-8);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo-dot {
    color: var(--color-gray-500);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-10);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: color var(--transition-base);
}

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

.nav-cta {
    color: var(--color-white);
    padding: var(--space-3) var(--space-6);
    border: 1px solid var(--color-gray-600);
    transition: all var(--transition-base);
}

.nav-cta:hover {
    background-color: var(--color-white);
    color: var(--color-black);
    border-color: var(--color-white);
}

.nav-toggle {
    display: none;
    width: 32px;
    height: 32px;
    position: relative;
}

.hamburger {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-base);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--color-bg-primary);
        flex-direction: column;
        justify-content: center;
        gap: var(--space-8);
        transition: right var(--transition-base);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        font-size: var(--font-size-2xl);
    }
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(255,255,255,0.08) 0%, transparent 60%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--space-8);
    max-width: 1000px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-5);
    background-color: rgba(255,255,255,0.05);
    border: 1px solid var(--color-gray-800);
    border-radius: 100px;
    margin-bottom: var(--space-10);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-400);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(var(--font-size-5xl), 12vw, var(--font-size-7xl));
    font-weight: 900;
    letter-spacing: -0.04em;
    margin-bottom: var(--space-6);
    line-height: 0.9;
}

.title-line {
    display: inline;
}

.title-dot {
    color: var(--color-gray-500);
}

.hero-tagline {
    font-size: clamp(var(--font-size-lg), 3vw, var(--font-size-2xl));
    font-weight: 400;
    color: var(--color-gray-300);
    margin-bottom: var(--space-6);
    letter-spacing: 0.02em;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
    max-width: 600px;
    margin: 0 auto var(--space-12);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-10);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-gray-600);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-line {
    width: 2px;
    height: 8px;
    background-color: var(--color-gray-400);
    border-radius: 2px;
    animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(10px); opacity: 0.3; }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: 0;
    transition: all var(--transition-base);
}

.btn-primary {
    background-color: var(--color-white);
    color: var(--color-black);
    border: 2px solid var(--color-white);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-gray-600);
}

.btn-secondary:hover {
    border-color: var(--color-white);
}

/* ============================================
   Mission Section
   ============================================ */

.section-mission {
    background-color: var(--color-bg-secondary);
}

.mission-points {
    display: grid;
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.mission-point {
    display: flex;
    gap: var(--space-6);
    padding: var(--space-6);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-gray-800);
    transition: all var(--transition-base);
}

.mission-point:hover {
    border-color: var(--color-gray-600);
    transform: translateX(4px);
}

.point-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-400);
}

.point-icon svg {
    width: 24px;
    height: 24px;
}

.point-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.point-content p {
    color: var(--color-gray-400);
    font-size: var(--font-size-base);
}

/* ============================================
   Pillars Section
   ============================================ */

.section-pillars {
    background-color: var(--color-bg-primary);
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

@media (max-width: 1024px) {
    .pillars-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
}

.pillar-card {
    padding: var(--space-10);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-gray-800);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.pillar-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-white) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.pillar-card:hover {
    border-color: var(--color-gray-600);
    transform: translateY(-4px);
}

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

.pillar-number {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    color: var(--color-gray-800);
    margin-bottom: var(--space-6);
    line-height: 1;
}

.pillar-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.pillar-line {
    width: 40px;
    height: 2px;
    background-color: var(--color-gray-600);
    margin-bottom: var(--space-6);
}

.pillar-description {
    color: var(--color-gray-400);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.pillar-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.pillar-features li {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    padding-left: var(--space-4);
    position: relative;
}

.pillar-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background-color: var(--color-gray-600);
}

/* ============================================
   Products Section
   ============================================ */

.section-products {
    background-color: var(--color-bg-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}

.product-card {
    padding: var(--space-10);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-gray-800);
    transition: all var(--transition-base);
    position: relative;
}

.product-card:hover {
    border-color: var(--color-gray-600);
}

.product-status {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
    padding: var(--space-2) var(--space-4);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-gray-700);
    margin-bottom: var(--space-6);
}

.product-name {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.product-description {
    color: var(--color-gray-400);
    margin-bottom: var(--space-6);
    line-height: 1.7;
}

.product-tags {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.tag {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-gray-500);
    padding: var(--space-1) var(--space-3);
    border: 1px solid var(--color-gray-700);
}

/* ============================================
   Roadmap Section
   ============================================ */

.section-roadmap {
    background-color: var(--color-bg-primary);
}

.roadmap-timeline {
    position: relative;
    padding-left: var(--space-16);
}

.timeline-line {
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-gray-700) 0%, transparent 100%);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-12);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--space-16) + 2px);
    top: 0;
}

.marker-dot {
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-gray-600);
    border-radius: 50%;
    background-color: var(--color-bg-primary);
}

.marker-dot.active {
    border-color: var(--color-white);
    background-color: var(--color-white);
}

.timeline-content {
    padding-left: var(--space-4);
}

.timeline-year {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-2);
}

.timeline-content h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.timeline-content p {
    color: var(--color-gray-400);
}

/* ============================================
   Values Section
   ============================================ */

.section-values {
    background-color: var(--color-bg-secondary);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

@media (max-width: 1024px) {
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .values-grid {
        grid-template-columns: 1fr;
    }
}

.value-item {
    padding: var(--space-8);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-gray-800);
    transition: all var(--transition-base);
}

.value-item:hover {
    border-color: var(--color-gray-600);
}

.value-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-gray-700);
    margin-bottom: var(--space-4);
}

.value-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

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

.section-about {
    background-color: var(--color-bg-primary);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-8);
    max-width: 500px;
}

@media (max-width: 640px) {
    .team-grid {
        grid-template-columns: 1fr;
    }
}

.team-member {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-6);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-gray-800);
}

.member-avatar {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-gray-700);
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
}

.member-info h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.member-info span {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

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

.section-contact {
    background-color: var(--color-bg-secondary);
    padding: var(--space-32) 0;
}

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

.contact-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 700;
    margin-bottom: var(--space-6);
}

.contact-description {
    font-size: var(--font-size-xl);
    color: var(--color-gray-400);
    margin-bottom: var(--space-12);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    max-width: 600px;
    margin: 0 auto;
}

@media (max-width: 640px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-8);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-gray-800);
    transition: all var(--transition-base);
    position: relative;
}

.contact-card:hover {
    border-color: var(--color-white);
    transform: translateY(-4px);
}

.contact-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--space-2);
}

.contact-email {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.contact-arrow {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    font-size: var(--font-size-xl);
    color: var(--color-gray-600);
    transition: all var(--transition-base);
}

.contact-card:hover .contact-arrow {
    color: var(--color-white);
    transform: translate(4px, -4px);
}

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

.footer {
    padding: var(--space-12) 0;
    border-top: 1px solid var(--color-gray-800);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-4);
}

.footer-logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
    margin-top: var(--space-4);
}

/* ============================================
   Animations
   ============================================ */

.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; opacity: 0; }
.delay-2 { animation-delay: 0.4s; opacity: 0; }
.delay-3 { animation-delay: 0.6s; opacity: 0; }

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal.delay-1 { transition-delay: 0.15s; }
.reveal.delay-2 { transition-delay: 0.3s; }
.reveal.delay-3 { transition-delay: 0.45s; }

/* ============================================
   Utility Classes
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}