/* ═══════════════════════════════════════════════
 *  Virtual Autonomy Ltd — Design System
 *  ═══════════════════════════════════════════════ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Outfit:wght@400;500;600;700;800&display=swap');

/* ── Design Tokens ── */
:root {
    /* Brand Palette */
    --va-dark: #111114;
    --va-dark-alt: #18181c;
    --va-dark-surface: #1e1e24;
    --va-dark-card: #232329;
    --va-dark-border: #2a2a32;
    --va-orange-start: #ea580c;
    --va-orange-mid: #f97316;
    --va-orange-end: #fbbf24;
    --va-gradient: linear-gradient(135deg, var(--va-orange-start), var(--va-orange-mid), var(--va-orange-end));
    --va-gradient-text: linear-gradient(90deg, var(--va-orange-start), var(--va-orange-end));
    --va-glow: rgba(249, 115, 22, 0.25);
    --va-glow-strong: rgba(249, 115, 22, 0.45);

    /* Text */
    --va-text: #ececf0;
    --va-text-muted: #8a8a9a;
    --va-text-dim: #5a5a6a;

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2.5rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Transitions */
    --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 0.2s;
    --duration-med: 0.4s;
    --duration-slow: 0.7s;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    scrollbar-gutter: stable;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    background: var(--va-dark);
    color: var(--va-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Dot-matrix background pattern */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
    z-index: 0;
}

a {
    color: var(--va-orange-mid);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
    color: var(--va-orange-end);
}

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

ul,
ol {
    list-style: none;
}

/* ── Typography ── */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.15;
    color: var(--va-text);
}

h1 {
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.5rem);
}

h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
}

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

.section-subtitle {
    font-size: 0.95rem;
    color: var(--va-text-muted);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-weight: 600;
    margin-bottom: 0;
}

/* ── Layout ── */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

section {
    position: relative;
    z-index: 1;
    padding: var(--space-3xl) 0;
}

/* ══════════════════════════════
 *  NAVIGATION
 *  ══════════════════════════════ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--space-md) 0;
    transition: all var(--duration-med) var(--ease-out);
}

.navbar.scrolled {
    background: rgba(17, 17, 20, 0.85);
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    border-bottom: 1px solid var(--va-dark-border);
    padding: var(--space-sm) 0;
}

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

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

.nav-logo img {
    height: 49px;
    width: auto;
    transition: transform var(--duration-med) var(--ease-out);
}

.nav-logo:hover img {
    transform: rotate(-8deg) scale(1.05);
}

.nav-logo-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--va-text);
    letter-spacing: 0.5px;
}

.nav-logo-text span {
    background: var(--va-gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--va-text-muted);
    position: relative;
    padding: var(--space-xs) 0;
    transition: color var(--duration-fast) var(--ease-out);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--va-gradient);
    border-radius: 2px;
    transition: width var(--duration-med) var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--va-text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-cta {
    background: var(--va-gradient) !important;
    color: #fff !important;
    padding: 10px 24px !important;
    border-radius: var(--radius-full) !important;
    font-weight: 600 !important;
    font-size: 0.85rem !important;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 20px var(--va-glow);
    transition: all var(--duration-med) var(--ease-out) !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 30px var(--va-glow-strong) !important;
}

/* Hamburger */
.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    background: none;
    border: none;
}

.nav-hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--va-text);
    border-radius: 2px;
    transition: all var(--duration-med) var(--ease-out);
    transform-origin: center;
}

.nav-hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ══════════════════════════════
 *  HERO SECTION
 *  ══════════════════════════════ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 0;
}

.hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    pointer-events: none;
}

/* Gradient overlay on top of Three.js */
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg,
                                rgba(17, 17, 20, 0.3) 0%,
                                rgba(17, 17, 20, 0.1) 40%,
                                rgba(17, 17, 20, 0.6) 85%,
                                rgba(17, 17, 20, 1) 100%);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: var(--space-xl);
}

.hero-logo {
    width: 100px;
    height: auto;
    margin: 0 auto var(--space-lg);
    animation: float 4s ease-in-out infinite;
    filter: drop-shadow(0 0 30px var(--va-glow));
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-12px);
    }
}

.hero h1 {
    margin-bottom: var(--space-lg);
    letter-spacing: -1px;
}

.hero-tagline {
    position: relative;
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: #ffffff;
    max-width: 700px;
    margin: 0 auto var(--space-xl);
    line-height: 1.6;
    animation: fadeInUp 1s ease-out 0.2s both;
    padding: var(--space-xl);
}

.hero-tagline::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -25%;
    right: -25%;
    bottom: -50%;
    z-index: -1;
    background: radial-gradient(75% 35% at center, rgba(16, 16, 19, 1.0) 0%, rgba(16, 16, 19, 0.7) 40%, rgba(16, 16, 19, 0) 70%);
    pointer-events: none;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--duration-med) var(--ease-out);
    text-decoration: none;
    min-height: 48px;
}

.btn-primary {
    background: var(--va-gradient);
    color: #fff;
    box-shadow: 0 4px 24px var(--va-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px var(--va-glow-strong);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--va-text);
    border: 1px solid var(--va-dark-border);
    backdrop-filter: blur(8px);
}

.btn-outline:hover {
    border-color: var(--va-orange-mid);
    color: var(--va-orange-mid);
    background: rgba(249, 115, 22, 0.05);
    transform: translateY(-3px);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute !important;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: pulse-down 2s ease-in-out infinite;
}

.scroll-indicator span {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--va-text-dim);
}

.scroll-indicator-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--va-orange-mid), transparent);
}

@keyframes pulse-down {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }

    50% {
        transform: translateX(-50%) translateY(8px);
        opacity: 0.5;
    }
}

/* ══════════════════════════════
 *  SERVICES / CARDS
 *  ══════════════════════════════ */
.services {
    background: var(--va-dark);
}

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

.section-header h2 {
    margin-bottom: var(--space-md);
}

.section-header p {
    color: var(--va-text-muted);
    max-width: 550px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.service-card {
    background: var(--va-dark-card);
    border: 1px solid var(--va-dark-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--duration-med) var(--ease-out);
    cursor: default;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--va-gradient);
    opacity: 0;
    transition: opacity var(--duration-med) var(--ease-out);
}

.service-card:hover {
    transform: translateY(-6px);
    border-color: rgba(249, 115, 22, 0.25);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px var(--va-glow);
}

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

.service-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    background: rgba(249, 115, 22, 0.08);
    border: 1px solid rgba(249, 115, 22, 0.15);
    color: var(--va-orange-mid);
    transition: all var(--duration-med) var(--ease-out);
}

.service-card:hover .service-icon {
    background: rgba(249, 115, 22, 0.15);
    transform: scale(1.05);
    box-shadow: 0 0 24px var(--va-glow);
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-card h3 {
    margin-bottom: 0;
}

.service-card p {
    color: var(--va-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ══════════════════════════════
 *  CTA BANNER
 *  ══════════════════════════════ */
.cta-section {
    position: relative;
    overflow: hidden;
}

.cta-banner {
    background: var(--va-dark-card);
    border: 1px solid var(--va-dark-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl) var(--space-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, var(--va-glow) 0%, transparent 60%);
    opacity: 0.3;
    pointer-events: none;
}

.cta-banner h2 {
    margin-bottom: var(--space-md);
}

.cta-banner p {
    color: var(--va-text-muted);
    margin-bottom: var(--space-xl);
    font-size: 1.05rem;
}

/* ══════════════════════════════
 *  FOOTER
 *  ══════════════════════════════ */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--va-dark-border);
    padding: var(--space-2xl) 0 var(--space-xl);
    background: var(--va-dark-alt);
}

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

.footer-brand p {
    color: var(--va-text-muted);
    font-size: 0.9rem;
    margin-top: var(--space-md);
    max-width: 320px;
    line-height: 1.7;
}

.footer h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--va-text-muted);
    margin-bottom: var(--space-lg);
}

.footer-links a {
    display: block;
    color: var(--va-text-dim);
    font-size: 0.9rem;
    padding: var(--space-xs) 0;
    transition: all var(--duration-fast) var(--ease-out);
}

.footer-links a:hover {
    color: var(--va-orange-mid);
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid var(--va-dark-border);
    padding-top: var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-bottom p {
    color: var(--va-text-dim);
    font-size: 0.8rem;
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    border: 1px solid var(--va-dark-border);
    color: var(--va-text-dim);
    transition: all var(--duration-med) var(--ease-out);
}

.footer-social a:hover {
    border-color: var(--va-orange-mid);
    color: var(--va-orange-mid);
    background: rgba(249, 115, 22, 0.08);
    transform: translateY(-2px);
}

/* ══════════════════════════════
 *  ABOUT PAGE
 *  ══════════════════════════════ */
.page-hero {
    padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
    text-align: center;
    position: relative;
    z-index: 1;
}

.page-hero h1 {
    margin-bottom: var(--space-md);
}

.page-hero p {
    color: var(--va-text-muted);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

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

.about-text h2 {
    margin-bottom: var(--space-lg);
}

.about-text p {
    color: var(--va-text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-visual img {
    max-width: 300px;
    filter: drop-shadow(0 0 40px var(--va-glow));
    animation: float 5s ease-in-out infinite;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.expertise-item {
    background: var(--va-dark-card);
    border: 1px solid var(--va-dark-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    transition: all var(--duration-med) var(--ease-out);
}

.expertise-item:hover {
    border-color: rgba(249, 115, 22, 0.2);
    transform: translateY(-3px);
}

.expertise-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0;
}

.expertise-item p {
    color: var(--va-text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ══════════════════════════════
 *  CONTACT PAGE
 *  ══════════════════════════════ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.contact-form {
    background: var(--va-dark-card);
    border: 1px solid var(--va-dark-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--va-text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 0;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--va-dark-surface);
    border: 1px solid var(--va-dark-border);
    border-radius: var(--radius-sm);
    color: var(--va-text);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all var(--duration-fast) var(--ease-out);
    min-height: 48px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--va-orange-mid);
    box-shadow: 0 0 0 3px var(--va-glow);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

.contact-info h3 {
    margin-bottom: var(--space-lg);
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: var(--va-dark-card);
    border: 1px solid var(--va-dark-border);
    border-radius: var(--radius-md);
    transition: all var(--duration-med) var(--ease-out);
}

.contact-detail:hover {
    border-color: rgba(249, 115, 22, 0.2);
}

.contact-detail-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: rgba(249, 115, 22, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--va-orange-mid);
}

.contact-detail h4 {
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
    text-transform: none;
    letter-spacing: 0;
    color: var(--va-text);
}

.contact-detail p {
    color: var(--va-text-muted);
    font-size: 0.9rem;
}

/* ══════════════════════════════
 *  ANIMATIONS — Scroll reveal
 *  ══════════════════════════════ */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: all var(--duration-slow) var(--ease-out);
}

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

/* ══════════════════════════════
 *  RESPONSIVE
 *  ══════════════════════════════ */

/* Tablet */
@media (max-width: 968px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--va-dark-alt);
        flex-direction: column;
        justify-content: center;
        gap: var(--space-xl);
        padding: var(--space-xl);
        transition: right var(--duration-med) var(--ease-out);
        border-left: 1px solid var(--va-dark-border);
    }

    .nav-links.open {
        right: 0;
    }

    .nav-hamburger {
        display: flex;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 640px) {
    .container {
        padding: 0 var(--space-md);
    }

    section {
        padding: var(--space-2xl) 0;
    }

    .hero-content {
        padding: var(--space-md);
        padding-top: var(--space-2xl);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .scroll-indicator {
        bottom: 12px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .cta-banner {
        padding: var(--space-xl) var(--space-md);
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .nav-logo-text {
        font-size: 0.95rem;
    }
}

@media (max-width: 640px) and (orientation: portrait) {
    .hero-fallback-img {
        object-position: 65% center;
    }
}

/* Hide scroll indicator on short portrait screens to avoid overlapping buttons */
@media (max-width: 640px) and (max-height: 750px) {
    .scroll-indicator {
        display: none;
    }
}

/* Landscape mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: calc(60px + var(--space-xl)) 0 var(--space-xl);
    }

    .hero-logo {
        width: 60px;
        margin-bottom: 0;
    }

    .scroll-indicator {
        display: none;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for keyboard nav */
:focus-visible {
    outline: 2px solid var(--va-orange-mid);
    outline-offset: 3px;
}