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

:root {
    --color-primary: #1a2942;
    --color-primary-light: #2c3e5d;
    --color-accent: #c9a961;
    --color-accent-light: #d4b574;
    --color-bg: #fafafa;
    --color-white: #ffffff;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #f1f3f5;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-500: #adb5bd;
    --color-gray-700: #495057;
    --color-gray-900: #212529;
    --color-text: #2c3e5d;
    --color-text-light: #6c757d;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-width: 1200px;
    --section-padding: 100px 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-primary);
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

.logo-mark {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Playfair Display', serif;
    font-size: 22px;
    font-weight: 700;
    border-radius: 4px;
    letter-spacing: -1px;
}

.logo-text {
    font-family: 'Playfair Display', serif;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}

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

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

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

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 100px 0;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #1a2942 0%, #2c3e5d 50%, #1a2942 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(201, 169, 97, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(201, 169, 97, 0.1) 0%, transparent 50%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

.hero-content {
    max-width: 800px;
    color: var(--color-white);
    animation: fadeInUp 1s ease-out;
}

.hero-tagline {
    font-family: 'Playfair Display', serif;
    font-size: 14px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 24px;
    opacity: 0.9;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 32px;
    letter-spacing: 0.02em;
}

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

.hero-description {
    font-size: 17px;
    line-height: 1.9;
    opacity: 0.85;
    margin-bottom: 48px;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 16px 36px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(201, 169, 97, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-white);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-white);
    opacity: 0.6;
}

.hero-scroll span {
    font-size: 12px;
    letter-spacing: 2px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: var(--color-white);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -60px;
    left: 0;
    width: 100%;
    height: 60px;
    background: var(--color-accent);
    animation: scrollDown 2s ease-in-out infinite;
}

/* ===== Section Common ===== */
section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    font-family: 'Playfair Display', serif;
    font-size: 14px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.02em;
}

/* ===== About ===== */
.about {
    background: var(--color-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-heading {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 32px;
    line-height: 1.5;
}

.about-paragraph {
    font-size: 16px;
    line-height: 1.9;
    color: var(--color-text);
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.stat-card {
    background: var(--color-gray-50);
    padding: 40px 24px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.stat-card:nth-child(3) {
    grid-column: span 2;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    border-color: var(--color-accent);
}

.stat-number {
    font-family: 'Playfair Display', serif;
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 12px;
}

.stat-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 4px;
    letter-spacing: 1px;
}

.stat-desc {
    font-size: 13px;
    color: var(--color-text-light);
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--color-white);
    padding: 48px 36px;
    border-radius: 8px;
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--color-accent);
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    border-radius: 8px;
    background: var(--color-gray-50);
}

.service-icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.service-icon-ai {
    background: rgba(26, 41, 66, 0.05);
}

.service-icon-web {
    background: rgba(201, 169, 97, 0.1);
}

.service-icon-web svg {
    color: var(--color-accent);
}

.service-icon-pearl {
    background: rgba(108, 117, 125, 0.08);
}

.service-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

.service-description {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: 24px;
}

.service-features {
    list-style: none;
}

.service-features li {
    font-size: 14px;
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--color-text);
    border-top: 1px solid var(--color-gray-100);
}

.service-features li:first-child {
    border-top: none;
}

.service-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

/* ===== Company ===== */
.company {
    background: var(--color-white);
}

.company-table {
    max-width: 900px;
    margin: 0 auto;
}

.company-row {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 40px;
    padding: 28px 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.company-row:first-child {
    border-top: 1px solid var(--color-gray-200);
}

.company-row dt {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 15px;
    letter-spacing: 0.5px;
}

.company-row dd {
    color: var(--color-text);
    font-size: 15px;
    line-height: 1.8;
}

/* ===== Contact ===== */
.contact {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 80% 20%, rgba(201, 169, 97, 0.1) 0%, transparent 40%);
}

.contact .section-title {
    color: var(--color-white);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.contact-lead {
    font-size: 17px;
    line-height: 1.9;
    margin-bottom: 48px;
    opacity: 0.9;
}

.contact-info {
    margin-bottom: 40px;
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 24px 48px;
    background: var(--color-white);
    color: var(--color-primary);
    text-decoration: none;
    border-radius: 4px;
    font-size: 18px;
    font-weight: 500;
    transition: var(--transition);
}

.contact-email:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(201, 169, 97, 0.3);
}

.contact-email svg {
    width: 20px;
    height: 20px;
}

.contact-note {
    font-size: 13px;
    line-height: 1.8;
    opacity: 0.7;
}

/* ===== Footer ===== */
.footer {
    background: #0f1828;
    color: var(--color-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-brand .logo-mark {
    background: var(--color-accent);
    color: var(--color-primary);
}

.footer-nav {
    display: flex;
    gap: 32px;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 30px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

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

@keyframes scrollDown {
    0% { top: -60px; }
    100% { top: 60px; }
}

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

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .about-content {
        gap: 60px;
    }

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

@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: 40px;
        gap: 24px;
        transform: translateX(100%);
        transition: var(--transition);
        height: calc(100vh - 80px);
        box-shadow: -8px 0 24px rgba(0, 0, 0, 0.05);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

    .company-row {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 20px 0;
    }

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

    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }

    .section-header {
        margin-bottom: 60px;
    }

    .contact-email {
        padding: 20px 32px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0;
    }

    .stat-card:nth-child(3) {
        grid-column: span 1;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .service-card {
        padding: 36px 24px;
    }
}