:root {
    --bg-primary: #F9F9F8;
    --bg-secondary: #F1F1EF;
    --bg-tertiary: #E8E8E5;
    --text-primary: #1A1A1A;
    --text-secondary: #4A4A4A;
    --text-tertiary: #6B6B6B;
    --accent: #C73E3E;
    --accent-dark: #A33232;
    --dark: #1E2328;
    --dark-secondary: #2A3038;
    --border: rgba(26, 26, 26, 0.08);
    --border-strong: rgba(26, 26, 26, 0.15);
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    font-weight: 400;
    overflow-x: hidden;
}

/* Grid Background Pattern */
.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
    background-image:
        linear-gradient(rgba(26, 26, 26, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(26, 26, 26, 0.08) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.25rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(249, 249, 248, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}

nav.scrolled {
    padding: 1rem 3rem;
    background: rgba(249, 249, 248, 0.95);
}

.logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

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

.nav-links a {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text-primary);
    transition: width 0.3s ease;
}

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

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

.nav-cta {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    background: var(--dark);
    color: var(--bg-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--dark);
}

.nav-cta:hover {
    background: transparent;
    color: var(--dark);
}

/* Mobile Nav */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    background: none;
    border: none;
}

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

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: 999;
    padding: 6rem 2rem 2rem;
    flex-direction: column;
    gap: 2rem;
}

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

.mobile-menu a {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

/* Section base */
section {
    position: relative;
    z-index: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 3rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 6rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.2s;
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.4s;
}

.hero h1 span {
    display: block;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 2.5rem;
    max-width: 600px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.6s;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.8s;
}

.btn-primary {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 1rem 2rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(199, 62, 62, 0.2);
}

.btn-secondary {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 1rem 2rem;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
    border-color: var(--text-primary);
    background: var(--dark);
    color: var(--bg-primary);
}

.hero-visual {
    position: absolute;
    right: -5%;
    top: 50%;
    transform: translateY(-50%);
    width: 45%;
    height: 80%;
    opacity: 0.08;
    pointer-events: none;
}

.hero-visual svg {
    width: 100%;
    height: 100%;
}

/* About Section */
.about {
    padding: 8rem 0;
    background: var(--bg-secondary);
}

.section-header {
    margin-bottom: 4rem;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--accent);
    display: block;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

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

.about-text p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-highlight {
    padding: 2rem;
    background: var(--bg-primary);
    border-left: 3px solid var(--accent);
}

.about-highlight p {
    font-size: 1rem;
    line-height: 2;
    color: var(--text-primary);
    margin: 0;
}

/* Company Info */
.company-info {
    margin-top: 4rem;
    padding-top: 4rem;
    border-top: 1px solid var(--border);
}

.company-info h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 2rem;
}

.company-table {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.company-row {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 2rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.company-row:first-child {
    border-top: 1px solid var(--border);
}

.company-row dt {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}

.company-row dd {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .company-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

/* Services Section */
.services {
    padding: 8rem 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.service-card {
    padding: 2.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover {
    background: var(--bg-primary);
    border-color: var(--border-strong);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 48px;
    height: 48px;
    background: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--bg-primary);
}

.service-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 1rem;
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

.service-tag {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    padding: 0.375rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

/* Strengths Section */
.strengths {
    padding: 8rem 0;
    background: var(--dark);
    color: var(--bg-primary);
}

.strengths .section-title {
    color: var(--bg-primary);
}

.strengths-intro {
    font-size: 1.125rem;
    color: rgba(249, 249, 248, 0.7);
    max-width: 600px;
    margin-bottom: 4rem;
    line-height: 1.9;
}

.strengths-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.strength-item {
    padding: 2rem 0;
    border-top: 1px solid rgba(249, 249, 248, 0.1);
}

.strength-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.strength-item h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.strength-item p {
    font-size: 0.9375rem;
    color: rgba(249, 249, 248, 0.6);
    line-height: 1.8;
}

/* Cases Section */
.cases {
    padding: 8rem 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.case-card {
    padding: 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.case-card:hover {
    border-color: var(--border-strong);
}

.case-type {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
}

.case-card h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.case-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.cases-note {
    margin-top: 3rem;
    padding: 1.5rem 2rem;
    background: var(--bg-tertiary);
    font-size: 0.875rem;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cases-note svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-tertiary);
    flex-shrink: 0;
}

/* Profile Section */
.profile {
    padding: 8rem 0;
    background: var(--bg-secondary);
}

.profile-content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 4rem;
    align-items: start;
}

.profile-image {
    aspect-ratio: 1;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.profile-image::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid var(--border);
    z-index: 1;
    pointer-events: none;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-info h3 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.profile-name {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
}

.profile-expertise {
    margin-bottom: 2rem;
}

.profile-expertise h4 {
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.expertise-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.expertise-item {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.profile-bio {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.9;
}

.profile-social {
    margin-top: 1.5rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.social-link svg {
    width: 18px;
    height: 18px;
}

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

/* Contact Section */
.contact {
    padding: 8rem 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.contact-info p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.contact-item svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-tertiary);
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.contact-item a:hover {
    color: var(--accent);
}

.contact-form {
    padding: 2.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

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

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    transition: border-color 0.2s ease;
}

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

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

.form-submit {
    width: 100%;
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    background: var(--dark);
    color: var(--bg-primary);
    border: 1px solid var(--dark);
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-submit:hover {
    background: var(--accent);
    border-color: var(--accent);
}

.form-note {
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-align: center;
}

.form-message {
    padding: 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    border-radius: 0;
}

.form-message--success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #166534;
}

.form-message--error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #991b1b;
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Footer */
footer {
    padding: 4rem 0 2rem;
    background: var(--dark);
    color: rgba(249, 249, 248, 0.6);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: start;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(249, 249, 248, 0.1);
    margin-bottom: 2rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--bg-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-logo .logo-img {
    width: 28px;
    height: 28px;
}

.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.8;
}

.footer-links {
    display: flex;
    gap: 4rem;
}

.footer-col h4 {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--bg-primary);
    margin-bottom: 1rem;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-col a {
    font-size: 0.875rem;
    color: rgba(249, 249, 248, 0.6);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-col a:hover {
    color: var(--bg-primary);
}

.footer-company-info ul li {
    color: rgba(249, 249, 248, 0.6);
    line-height: 1.6;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
}

.footer-bottom p {
    color: rgba(249, 249, 248, 0.4);
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

/* Responsive */
@media (max-width: 1024px) {
    .container {
        padding: 0 2rem;
    }

    nav {
        padding: 1rem 2rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .strengths-list {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .profile-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .profile-image {
        max-width: 280px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-cta {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

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

    .hero-visual {
        display: none;
    }

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

    .hero-cta .btn-primary,
    .hero-cta .btn-secondary {
        text-align: center;
        justify-content: center;
    }
}