/* ===================================
   HUMAIN - Futuristic Website Styles
   Cyberpunk / Dark Theme
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a25;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0b0;
    --color-text-muted: #6a6a7a;
    --color-accent: #00d4ff;
    --color-accent-secondary: #7b2fff;
    --color-accent-tertiary: #ff2d92;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7b2fff 50%, #ff2d92 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    
    /* Spacing */
    --section-padding: clamp(80px, 12vh, 150px);
    --container-max: 1200px;
    --container-padding: clamp(20px, 5vw, 60px);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.8s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

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

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

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

a {
    color: inherit;
    text-decoration: none;
}

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

/* Utility Classes */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

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

.section-label {
    font-family: var(--font-display);
    font-size: clamp(0.75rem, 1vw, 0.875rem);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: 2rem;
}

.section-label.center {
    text-align: center;
}

/* Fade In Animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Navigation
   =================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: background-color var(--transition-medium), padding var(--transition-medium);
}

.nav.scrolled {
    background-color: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
}

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

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gradient-primary);
    transition: width var(--transition-fast);
}

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

.nav-cta {
    padding: 0.625rem 1.25rem !important;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    color: var(--color-bg) !important;
    font-weight: 600 !important;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

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

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-medium);
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-menu a {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .mobile-menu {
        display: flex;
    }
}

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

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

/* Video Playlist Crossfade */
.video-playlist {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.playlist-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

.playlist-video.active {
    opacity: 1;
}

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 10, 15, 0.7) 0%,
        rgba(10, 10, 15, 0.5) 50%,
        rgba(10, 10, 15, 0.9) 100%
    );
}

/* Fallback gradient if no video */
.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(123, 47, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(255, 45, 146, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: 0 var(--container-padding);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-title-line {
    display: block;
}

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

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    font-weight: 400;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.3);
}

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

/* ===================================
   Vision Section
   =================================== */
.vision {
    background: var(--color-bg-secondary);
    overflow: hidden;
}

.vision-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.vision-paragraphs {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.vision-paragraph {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.vision-highlight {
    font-family: var(--font-display);
    font-size: clamp(1.375rem, 2.5vw, 1.75rem);
    font-weight: 600;
    color: var(--color-text);
}

.vision-images {
    position: relative;
}

.vision-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.vision-image {
    aspect-ratio: 4/5;
    background-size: cover;
    background-position: center;
    background-color: var(--color-bg-tertiary);
}

.vision-video-container {
    position: relative;
    aspect-ratio: 4/5;
    background-color: var(--color-bg-tertiary);
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.vision-single-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Scan Effect Overlay */
.scan-effect {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 10;
    overflow: hidden;
}

.scan-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(0, 212, 255, 0.8) 20%, 
        rgba(123, 47, 255, 1) 50%, 
        rgba(255, 45, 146, 0.8) 80%, 
        transparent 100%
    );
    box-shadow: 
        0 0 20px rgba(0, 212, 255, 0.8),
        0 0 40px rgba(123, 47, 255, 0.6),
        0 0 60px rgba(255, 45, 146, 0.4);
    opacity: 0;
    transform: translateY(-100%);
}

.scan-line.active {
    animation: scanDown 0.8s ease-out forwards;
}

@keyframes scanDown {
    0% {
        opacity: 1;
        transform: translateY(-100%);
    }
    100% {
        opacity: 0;
        transform: translateY(calc(100vh));
    }
}

.scan-flash {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.3) 0%, 
        rgba(123, 47, 255, 0.2) 50%, 
        rgba(255, 45, 146, 0.3) 100%
    );
    opacity: 0;
}

.scan-flash.active {
    animation: flashEffect 0.4s ease-out forwards;
}

@keyframes flashEffect {
    0% {
        opacity: 0.6;
    }
    100% {
        opacity: 0;
    }
}

.vision-video-container .playlist-video {
    object-fit: cover;
}

/* Model Selector Buttons */
.model-selector {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.model-btn {
    padding: 0.75rem 1.25rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.model-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}

.model-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--color-bg);
}

.vision-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(123, 47, 255, 0.1) 100%);
    z-index: 1;
    pointer-events: none;
}

.vision-bg-element {
    position: absolute;
    top: 50%;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(123, 47, 255, 0.1) 0%, transparent 70%);
    transform: translateY(-50%);
    pointer-events: none;
}

@media (max-width: 900px) {
    .vision-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .vision-images {
        order: -1;
    }
    
    .vision-image {
        aspect-ratio: 16/9;
    }
}

/* ===================================
   USP Section
   =================================== */
.usp {
    background: var(--color-bg);
}

.usp-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.usp-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-medium);
}

.usp-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.usp-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(123, 47, 255, 0.1) 100%);
    border-radius: 50%;
    color: var(--color-accent);
}

.usp-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.usp-comparison {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.usp-other, .usp-humain {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.usp-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
}

.usp-value {
    font-size: 0.9375rem;
    font-weight: 500;
}

.usp-other .usp-value {
    color: var(--color-text-secondary);
}

.usp-divider {
    height: 1px;
    background: var(--color-border);
}

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

@media (max-width: 600px) {
    .usp-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Video Section
   =================================== */
.video-section {
    background: var(--color-bg-secondary);
    text-align: center;
}

.video-intro {
    margin-bottom: 3rem;
}

.video-quote {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 600;
    font-style: italic;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.video-subtext {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

/* Video Carousel */
.video-carousel-wrapper {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 60px;
}

.video-carousel {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.carousel-track {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease-out;
}

.carousel-slide {
    min-width: 100%;
    height: 100%;
    position: relative;
}

.carousel-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
}

/* Carousel Arrows */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

.carousel-arrow:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--color-bg);
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: 0;
}

.carousel-next {
    right: 0;
}

/* Carousel Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background: var(--color-bg-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot:hover {
    background: var(--color-text-muted);
}

.carousel-dot.active {
    background: var(--gradient-primary);
    transform: scale(1.2);
}

@media (max-width: 768px) {
    .video-carousel-wrapper {
        padding: 0 20px;
    }
    
    .carousel-arrow {
        width: 40px;
        height: 40px;
    }
    
    .carousel-prev {
        left: -10px;
    }
    
    .carousel-next {
        right: -10px;
    }
}

/* ===================================
   Mission Section
   =================================== */
.mission {
    background: var(--color-bg);
    text-align: center;
    overflow: hidden;
}

.mission-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.mission-text {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.mission-highlight {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    line-height: 1.4;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mission-bg-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background: var(--color-bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-text {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.contact-text:last-of-type {
    margin-bottom: 0;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

@media (max-width: 900px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--color-bg);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-tagline {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2vw, 1.25rem);
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    font-style: italic;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.5rem;
}

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

.footer-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-social {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg-secondary);
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-accent);
    color: var(--color-bg);
    transform: translateY(-2px);
}

@media (max-width: 600px) {
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ===================================
   Scrollbar
   =================================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ===================================
   Selection
   =================================== */
::selection {
    background: rgba(0, 212, 255, 0.3);
    color: var(--color-text);
}