:root {
    /* Main Backgrounds */
    --bg-color: #111318;
    --surface-low: #1a1c20;
    --surface: #111318;
    --surface-high: #282a2e;
    --surface-container: #1e2024;
    --surface-container-highest: #333539;
    
    /* Accents */
    --primary: #e9feff;
    --primary-container: #00f5ff;
    --secondary: #ecb2ff;
    --tertiary: #efffe4;
    --accent-cyan: #00dce5;
    
    /* Text */
    --text-primary: #e2e2e8;
    --text-secondary: #b9caca;
    --text-muted: rgba(226, 222, 232, 0.4);
    
    /* Borders & Glass */
    --card-border: rgba(132, 148, 149, 0.1);
    --glass-blur: blur(12px);
    
    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Utils */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-max: 1440px;
}

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

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

/* Typography */
h1, h2, h3, h4, h5 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.05em;
    color: var(--primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--primary-container));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.secondary-gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Layout */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 4rem;
}

@media (max-width: 768px) {
    .container {
        padding: 0 2rem;
    }
}

section {
    padding: 8rem 0;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(17, 19, 24, 0.8);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 0;
    transition: var(--transition);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    text-decoration: none;
    color: var(--primary);
    letter-spacing: -0.05em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    transition: var(--transition);
    opacity: 0.7;
    position: relative;
    padding-bottom: 4px;
}

.nav-links a:hover, .nav-links a.active {
    opacity: 1;
    color: var(--primary-container);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-container);
}

/* Hero Section Base */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 5rem;
    background: radial-gradient(circle at 50% 50%, rgba(0, 245, 255, 0.05) 0%, transparent 70%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-container-high);
    border: 1px solid var(--card-border);
    border-radius: 100px;
    margin-bottom: 2rem;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.badge-text {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    color: var(--primary);
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 0.9;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 540px;
    animation: fadeInUp 1s ease-out;
    font-weight: 300;
}

.hero-visual {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-img {
    width: 140%;
    height: auto;
    opacity: 0.4;
    filter: brightness(1.2);
    mask-image: radial-gradient(circle, black 40%, transparent 80%);
    background: linear-gradient(135deg, var(--surface-container), var(--surface-low));
    min-height: 400px;
    object-fit: cover;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    right: 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.scroll-line {
    width: 60px;
    height: 1px;
    background: var(--card-border);
}

.scroll-indicator span {
    font-family: var(--font-heading);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--text-muted);
}

@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .hero-visual {
        display: none;
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: 4px;
    font-family: var(--font-heading);
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-container));
    color: #002021;
}

.btn-primary:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--primary);
}

.btn-secondary:hover {
    background: var(--surface-high);
    border-color: var(--primary-container);
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 4rem;
    gap: 2rem;
}

.section-subtitle {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.4em;
    color: var(--secondary);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 4rem);
    text-transform: uppercase;
    line-height: 1;
}

.section-desc {
    max-width: 300px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: right;
}

@media (max-width: 1024px) {
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }
    .section-desc {
        text-align: left;
    }
}

/* Bento Grid System */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 400px);
    gap: 1.5rem;
}

.bento-card {
    background: var(--surface-container);
    border: 1px solid var(--card-border);
    border-radius: 4px;
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}

.bento-card:hover {
    border-color: var(--primary-container);
    transform: translateY(-5px);
}

.card-content {
    position: relative;
    z-index: 2;
}

.card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.card-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    max-width: 250px;
}

.card-bg {
    position: absolute;
    bottom: -20%;
    right: -20%;
    width: 80%;
    height: auto;
    opacity: 0.1;
    z-index: 1;
    transition: var(--transition);
    filter: grayscale(1);
}

.bento-card:hover .card-bg {
    opacity: 0.2;
    transform: scale(1.1);
}

.card-tag {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-family: var(--font-heading);
    font-size: 0.6rem;
    color: var(--text-muted);
    letter-spacing: 0.3em;
}

.material-symbols-outlined.icon-primary { color: var(--primary-container); font-size: 2.5rem; }
.material-symbols-outlined.icon-secondary { color: var(--secondary); font-size: 2.5rem; }
.material-symbols-outlined.icon-tertiary { color: var(--tertiary); font-size: 2.5rem; }

@media (max-width: 1024px) {
    .bento-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto;
    }
}

.card-icon-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 1px solid rgba(0, 245, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-container);
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    opacity: 0.5;
}


/* Animations */
@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.5; }
    100% { transform: scale(1); opacity: 1; }
}

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

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

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

/* Footer */
.footer {
    padding-top: 8rem;
    border-top: 1px solid var(--card-border);
    background: #0c0e12;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 4rem;
    padding-bottom: 4rem;
}

.footer-brand .logo {
    display: block;
    margin-bottom: 1.5rem;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 250px;
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    color: var(--text-muted);
}

.社会リンク .material-symbols-outlined {
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.social-links .material-symbols-outlined:hover {
    color: var(--primary-container);
}

.footer-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    color: var(--primary-container);
    margin-bottom: 2rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    border-top: 1px solid var(--card-border);
}

.footer-bottom p {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.footer-status {
    display: flex;
    gap: 2rem;
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-muted);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}