/* yochi - Dark Theme CSS */
:root {
    --bg-primary: #05070a;
    --bg-secondary: #0a0d14;
    --bg-card: #0d1117;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #484f58;
    --accent-blue: #58a6ff;
    --accent-cyan: #39d0d8;
    --accent-indigo: #8b5cf6;
    --border-subtle: rgba(255,255,255,0.06);
    --glow-blue: rgba(88, 166, 255, 0.15);
    --glow-cyan: rgba(57, 208, 216, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Animated background grid */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(88, 166, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88, 166, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.bg-glow {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 20%, var(--glow-blue) 0%, transparent 40%),
                radial-gradient(circle at 70% 80%, var(--glow-cyan) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
    animation: glowPulse 15s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 0;
    z-index: 100;
    background: linear-gradient(to bottom, var(--bg-primary) 0%, transparent 100%);
    backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    text-decoration: none;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo-kanji {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.9rem;
    font-weight: 300;
    color: var(--accent-cyan);
    opacity: 0.8;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links li {
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.3s ease;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-indigo) 100%);
    color: white;
    padding: 0.75rem 1.75rem;
    border-radius: 6px;
    box-shadow: 0 4px 20px rgba(88, 166, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(88, 166, 255, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 0.75rem 1.75rem;
    border-radius: 6px;
    border: 1px solid var(--border-subtle);
}

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

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
    z-index: 1;
}

.hero-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out;
}

.hero-logo-text {
    font-size: 5rem;
    font-weight: 300;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    text-transform: lowercase;
}

.hero-logo-kanji {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--accent-cyan);
    margin-top: 0.5rem;
    letter-spacing: 0.3em;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
    line-height: 1.8;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero .btn-primary {
    animation: fadeInUp 1s ease-out 0.6s both;
    position: relative;
    z-index: 10;
}

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

/* Radar Animation */
.radar-container {
    position: absolute;
    bottom: 5%;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 150px;
    opacity: 0.3;
    pointer-events: none;
}

.radar-arc {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 150px;
    border: 1px solid var(--accent-cyan);
    border-bottom: none;
    border-radius: 150px 150px 0 0;
}

.radar-arc:nth-child(2) {
    width: 200px;
    height: 100px;
    border-radius: 100px 100px 0 0;
}

.radar-arc:nth-child(3) {
    width: 100px;
    height: 50px;
    border-radius: 50px 50px 0 0;
}

.radar-sweep {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 150px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), transparent);
    transform-origin: left center;
    animation: radarSweep 4s linear infinite;
}

@keyframes radarSweep {
    from { transform: rotate(180deg); }
    to { transform: rotate(0deg); }
}

.radar-blip {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: blip 2s ease-in-out infinite;
}

.radar-blip:nth-child(5) { bottom: 60px; left: 80px; animation-delay: 0.5s; }
.radar-blip:nth-child(6) { bottom: 40px; left: 180px; animation-delay: 1s; }
.radar-blip:nth-child(7) { bottom: 90px; left: 220px; animation-delay: 1.5s; }

@keyframes blip {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.5); }
}

/* Section Styles */
section {
    position: relative;
    z-index: 1;
    padding: 8rem 0;
}

.section-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.8;
}

/* Problem Section */
.problem {
    background: var(--bg-secondary);
    text-align: center;
}

.problem .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.problem-stats {
    display: flex;
    gap: 4rem;
    margin-top: 4rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 4rem;
    font-weight: 600;
    color: var(--accent-blue);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* How It Works */
.how-it-works {
    background: var(--bg-primary);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.step {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 2.5rem;
    position: relative;
    transition: all 0.3s ease;
}

.step:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.step-number {
    font-size: 4rem;
    font-weight: 700;
    color: var(--border-subtle);
    position: absolute;
    top: 1rem;
    right: 1.5rem;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Data Sources */
.data-sources {
    background: var(--bg-secondary);
    text-align: center;
}

.data-sources .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.sources-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
    max-width: 800px;
}

.source-tag {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 0.75rem 1.5rem;
    border-radius: 100px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.source-tag:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* Capabilities */
.capabilities {
    background: var(--bg-primary);
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 4rem;
}

.capability {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 2rem;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    transition: all 0.3s ease;
}

.capability:hover {
    border-color: var(--accent-indigo);
}

.capability-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-indigo) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.capability-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.capability-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.capability-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Use Cases */
.use-cases {
    background: var(--bg-secondary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.case {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all 0.3s ease;
}

.case:hover {
    border-color: var(--accent-blue);
}

.case-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--accent-cyan);
}

.case-desc {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Security */
.security {
    background: var(--bg-primary);
    text-align: center;
}

.security .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 3rem;
}

.badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.badge-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.badge-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--accent-cyan);
}

.badge-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* CTA Section */
.cta {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    text-align: center;
    padding: 10rem 0;
}

.cta .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.cta .section-title {
    font-size: 3rem;
}

.cta .section-subtitle {
    margin-bottom: 3rem;
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 3rem;
    width: 100%;
    max-width: 600px;
    text-align: left;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group:last-of-type {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

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

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form .btn {
    width: 100%;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-subtle);
    padding: 3rem 0;
    position: relative;
    z-index: 1;
}

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

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.footer-copy {
    text-align: right;
}

.footer-copy p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-copy a {
    color: var(--accent-cyan);
    text-decoration: none;
}

.footer-copy a:hover {
    text-decoration: underline;
}

.footer-copy .company-info {
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border-subtle);
    padding: 1rem 2rem;
    z-index: 9999;
    transform: translateY(100%);
    transition: transform 0.3s ease-in-out;
}

.cookie-banner.visible {
    transform: translateY(0);
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.cookie-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
    flex: 1;
}

.cookie-link {
    color: var(--accent-cyan);
    text-decoration: underline;
}

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

.cookie-buttons {
    display: flex;
    gap: 0.75rem;
    flex-shrink: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .navbar {
        padding: 1rem 0;
    }

    section {
        padding: 6rem 0;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-logo-text {
        font-size: 4rem;
    }

    .steps-container,
    .capabilities-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .problem-stats {
        flex-direction: column;
        gap: 2rem;
    }

    .security-badges {
        flex-wrap: wrap;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border-subtle);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 0.75rem 0;
    }

    .navbar .btn-primary {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:first-child {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:last-child {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-logo-text {
        font-size: 3rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .footer-container {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

    .footer-copy {
        text-align: center;
    }

    .cookie-content {
        flex-direction: column;
        text-align: center;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .stat-number {
        font-size: 3rem;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .bg-glow {
        animation: none;
        opacity: 0.5;
    }

    .radar-sweep {
        animation: none;
    }

    .radar-blip {
        animation: none;
        opacity: 0.6;
    }
}