/* ===================================
   KYHOKI.COM - Design System & Styles
   =================================== */

/* CSS Custom Properties - Design Tokens */
:root {
    /* Colors */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #121212;
    --color-bg-card: #1a1a1a;
    --color-accent-primary: #ff6b35;
    --color-accent-secondary: #ff8c42;
    --color-accent-glow: rgba(255, 107, 53, 0.3);
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-text-muted: #707070;
    --color-border: rgba(255, 255, 255, 0.1);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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: 3rem;
    --font-size-6xl: 4rem;

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

    /* Layout */
    --container-max-width: 1200px;
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 32px var(--color-accent-glow);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-6xl);
}

h2 {
    font-size: var(--font-size-4xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

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

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

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

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

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

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

.nav-link-cta {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-accent-primary);
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: all var(--transition-base);
}

.nav-link-cta:hover {
    background: var(--color-accent-secondary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

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

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

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, #ffffff, #e0e0e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-weight: 400;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-cta-group {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    text-align: center;
    animation: fadeIn 1s ease-out 1s both;
}

.scroll-text {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    margin: 0 auto;
    border-left: 2px solid var(--color-accent-primary);
    border-bottom: 2px solid var(--color-accent-primary);
    transform: rotate(-45deg);
    animation: bounce 2s infinite;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--color-accent-secondary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-3px);
}

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

.btn-secondary:hover {
    background: var(--color-accent-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-3px);
}

/* Sections */
section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-3xl);
    font-weight: 300;
}

/* Services Section */
.services {
    background: var(--color-bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.service-card {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
}

.service-card.visible {
    animation: fadeInUp 0.6s ease-out forwards;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent-primary);
    box-shadow: var(--shadow-glow);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-primary);
    transition: transform var(--transition-base);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.service-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}

/* AI Section */
.ai-section {
    background: var(--color-bg-primary);
}

.ai-features {
    display: grid;
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-2xl);
}

.ai-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    opacity: 0;
    transform: translateY(30px);
}

.ai-feature.visible {
    animation: fadeInUp 0.8s ease-out forwards;
}

.ai-feature:nth-child(even) {
    direction: rtl;
}

.ai-feature:nth-child(even)>* {
    direction: ltr;
}

.ai-feature-visual {
    position: relative;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-feature-content h3 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.ai-feature-content p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 0;
}

/* AI Visual Diagrams */
.ai-node-diagram {
    position: relative;
    width: 100%;
    height: 100%;
}

.ai-node {
    position: absolute;
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: 50%;
    box-shadow: var(--shadow-glow);
    animation: pulse 3s ease-in-out infinite;
}

.node-1 {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.node-2 {
    top: 50%;
    right: 20%;
    animation-delay: 1s;
}

.node-3 {
    bottom: 20%;
    left: 40%;
    animation-delay: 2s;
}

.ai-connection {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent-primary), transparent);
    transform-origin: left center;
    animation: flowLine 2s ease-in-out infinite;
}

.connection-1 {
    top: 30%;
    left: 25%;
    width: 40%;
    transform: rotate(20deg);
}

.connection-2 {
    top: 55%;
    right: 25%;
    width: 35%;
    transform: rotate(-30deg);
}

.connection-3 {
    bottom: 25%;
    left: 35%;
    width: 30%;
    transform: rotate(45deg);
    animation-delay: 1s;
}

.ai-wave-diagram {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wave-line {
    position: absolute;
    width: 80%;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--color-accent-primary), transparent);
    border-radius: 2px;
    animation: wave 3s ease-in-out infinite;
}

.wave-1 {
    animation-delay: 0s;
}

.wave-2 {
    animation-delay: 0.5s;
    opacity: 0.7;
}

.wave-3 {
    animation-delay: 1s;
    opacity: 0.4;
}

.ai-flow-diagram {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-around;
}

.flow-step {
    width: 60px;
    height: 60px;
    background: var(--color-accent-primary);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-glow);
    animation: pulse 2s ease-in-out infinite;
}

.step-1 {
    animation-delay: 0s;
}

.step-2 {
    animation-delay: 0.5s;
}

.step-3 {
    animation-delay: 1s;
}

.flow-arrow {
    position: absolute;
    width: 50px;
    height: 2px;
    background: var(--color-accent-primary);
    top: 50%;
    animation: flowArrow 2s ease-in-out infinite;
}

.arrow-1 {
    left: 25%;
    animation-delay: 0.2s;
}

.arrow-2 {
    right: 25%;
    animation-delay: 0.7s;
}

.ai-brain-diagram {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brain-core {
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: 50%;
    box-shadow: var(--shadow-glow);
    animation: rotate 20s linear infinite;
}

.brain-pulse {
    position: absolute;
    width: 120px;
    height: 120px;
    border: 2px solid var(--color-accent-primary);
    border-radius: 50%;
    animation: ripple 3s ease-out infinite;
}

.pulse-1 {
    animation-delay: 0s;
}

.pulse-2 {
    animation-delay: 1s;
}

.pulse-3 {
    animation-delay: 2s;
}

/* About Section */
.about {
    background: var(--color-bg-secondary);
}

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

.about-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

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

.contact-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.contact-option {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.contact-option:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent-primary);
    box-shadow: var(--shadow-glow);
}

.contact-option-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-accent-primary);
}

.contact-option-icon svg {
    width: 100%;
    height: 100%;
}

.contact-option h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.contact-option p {
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.contact-form-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    background: var(--color-bg-card);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-primary);
}

.contact-info {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

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

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

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

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0) rotate(-45deg);
    }

    40% {
        transform: translateY(-10px) rotate(-45deg);
    }

    60% {
        transform: translateY(-5px) rotate(-45deg);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

@keyframes flowLine {
    0% {
        opacity: 0.3;
    }

    50% {
        opacity: 1;
    }

    100% {
        opacity: 0.3;
    }
}

@keyframes wave {

    0%,
    100% {
        transform: translateY(0) scaleX(1);
    }

    50% {
        transform: translateY(-20px) scaleX(0.95);
    }
}

@keyframes flowArrow {

    0%,
    100% {
        opacity: 0.5;
        transform: translateX(0);
    }

    50% {
        opacity: 1;
        transform: translateX(10px);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes ripple {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    100% {
        transform: scale(2);
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 1200px) {
    :root {
        --font-size-6xl: 3rem;
        --font-size-4xl: 2rem;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 2.5rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --spacing-3xl: 4rem;
    }

    .nav-menu {
        gap: var(--spacing-md);
    }

    .hero-cta-group {
        flex-direction: column;
    }

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

    .ai-feature {
        grid-template-columns: 1fr;
    }

    .ai-feature:nth-child(even) {
        direction: ltr;
    }

    .ai-feature-visual {
        height: 200px;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-6xl: 2rem;
        --font-size-xl: 1rem;
        --spacing-lg: 1rem;
    }

    .nav-container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-base);
    }

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