/* ==========================================
   株式会社MMM Corporate Website
   Main Stylesheet
   ========================================== */

/* === CSS Custom Properties === */
:root {
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-light-gray: #e9ecef;
    --color-gray: #adb5bd;
    --color-dark-gray: #6c757d;
    --color-charcoal: #343a40;
    --color-dark: #1a1a2e;
    --color-black: #0d0d0d;
    --color-accent: #2d2d2d;
    --color-accent-light: rgba(45, 45, 45, 0.08);
    --color-gold: #c9a96e;
    --color-gold-light: rgba(201, 169, 110, 0.15);

    --font-primary: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
    --font-display: 'Inter', 'Noto Sans JP', sans-serif;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1);

    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    --container-max: 1100px;
    --section-padding: 120px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--color-charcoal);
    background-color: var(--color-white);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-base);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.05);
}

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

.nav-logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
    z-index: 1001;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--color-white);
    transition: var(--transition-base);
}

.logo-sub {
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-base);
}

.navbar.scrolled .logo-text {
    color: var(--color-dark);
}

.navbar.scrolled .logo-sub {
    color: var(--color-dark-gray);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-link {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.85);
    position: relative;
    padding: 4px 0;
    transition: var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-gold);
    transition: var(--transition-base);
}

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

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

.navbar.scrolled .nav-link {
    color: var(--color-dark-gray);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: var(--color-dark);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.bar {
    width: 24px;
    height: 1.5px;
    background: var(--color-white);
    transition: var(--transition-base);
}

.navbar.scrolled .bar {
    background: var(--color-dark);
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 4px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -4px);
}

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

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(201, 169, 110, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 24px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 24px;
    border: 1px solid rgba(201, 169, 110, 0.4);
    border-radius: 50px;
    margin-bottom: 32px;
    opacity: 0;
    transform: translateY(30px);
}

.hero-badge span {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.3em;
    color: var(--color-gold);
}

.hero-title {
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(30px);
}

.hero-title-main {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 8vw, 7rem);
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--color-white);
    line-height: 1.1;
}

.hero-title-sub {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(0.75rem, 1.5vw, 1rem);
    font-weight: 300;
    letter-spacing: 0.5em;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

.hero-description {
    font-size: 1rem;
    font-weight: 300;
    line-height: 2;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.1em;
    margin-bottom: 48px;
    opacity: 0;
    transform: translateY(30px);
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    opacity: 0;
    transform: translateY(30px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 40px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    border-radius: 2px;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: #b89660;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(201, 169, 110, 0.3);
}

.btn-outline {
    background: transparent;
    color: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
    color: var(--color-white);
}

/* Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.scroll-text {
    font-family: var(--font-display);
    font-size: 0.6rem;
    font-weight: 400;
    letter-spacing: 0.3em;
    color: rgba(255, 255, 255, 0.4);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.4), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* === Section Styles === */
.section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 72px;
}

.section-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    color: var(--color-gold);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-dark);
    line-height: 1.4;
}

.section-divider {
    width: 40px;
    height: 1px;
    background: var(--color-gold);
    margin: 24px auto 0;
}

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

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.about-card {
    padding: 48px 40px;
    background: var(--color-white);
    border: 1px solid var(--color-light-gray);
    border-radius: 4px;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.about-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-4px);
}

.about-card-icon {
    color: var(--color-gold);
    margin-bottom: 24px;
}

.about-card-title {
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    color: var(--color-dark);
}

.about-card-text {
    font-size: 0.9rem;
    line-height: 2;
    color: var(--color-dark-gray);
}

.about-card-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: var(--transition-slow);
}

.about-card:hover .about-card-line {
    width: 100%;
}

/* === Service Section === */
.service {
    background: var(--color-off-white);
}

.service-grid {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.service-item {
    display: flex;
    gap: 40px;
    padding: 56px 48px;
    background: var(--color-white);
    border-radius: 4px;
    border: 1px solid transparent;
    transition: var(--transition-base);
}

.service-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-light-gray);
}

.service-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 200;
    color: var(--color-gold);
    line-height: 1;
    flex-shrink: 0;
    opacity: 0.6;
}

.service-title {
    font-size: 1.2rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    color: var(--color-dark);
}

.service-text {
    font-size: 0.9rem;
    line-height: 2;
    color: var(--color-dark-gray);
    margin-bottom: 24px;
}

.service-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.service-features li {
    font-size: 0.8rem;
    color: var(--color-dark-gray);
    padding: 6px 16px;
    background: var(--color-off-white);
    border-radius: 2px;
    letter-spacing: 0.02em;
}

/* === Message Section === */
.message {
    background: var(--color-white);
    position: relative;
}

.message-wrapper {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    padding: 64px 48px;
    position: relative;
}

.message-wrapper::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-display);
    font-size: 8rem;
    color: var(--color-gold);
    opacity: 0.1;
    line-height: 1;
}

.message-title {
    font-size: clamp(1.5rem, 3vw, 1.8rem);
    font-weight: 500;
    letter-spacing: 0.05em;
    line-height: 1.8;
    color: var(--color-dark);
    margin-bottom: 32px;
}

.message-text {
    font-size: 0.9rem;
    line-height: 2.2;
    color: var(--color-dark-gray);
    margin-bottom: 40px;
}

.message-signature {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-dark);
    letter-spacing: 0.1em;
}

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

.company-table-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-white);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.company-table {
    width: 100%;
    border-collapse: collapse;
}

.company-table tr {
    border-bottom: 1px solid var(--color-light-gray);
}

.company-table tr:last-child {
    border-bottom: none;
}

.company-table th,
.company-table td {
    padding: 20px 32px;
    text-align: left;
    font-size: 0.9rem;
    vertical-align: top;
}

.company-table th {
    width: 160px;
    font-weight: 500;
    color: var(--color-dark);
    background: var(--color-off-white);
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.company-table td {
    color: var(--color-dark-gray);
    line-height: 1.8;
}

.company-link {
    color: var(--color-gold);
    border-bottom: 1px solid transparent;
}

.company-link:hover {
    border-bottom-color: var(--color-gold);
}

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

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

.contact-description {
    font-size: 0.95rem;
    color: var(--color-dark-gray);
    line-height: 2;
    margin-bottom: 48px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 40px;
    background: var(--color-off-white);
    border-radius: 4px;
    width: 100%;
    max-width: 500px;
    transition: var(--transition-base);
}

.contact-item:hover {
    box-shadow: var(--shadow-md);
}

.contact-icon {
    color: var(--color-gold);
    flex-shrink: 0;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.contact-label {
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--color-gold);
    margin-bottom: 4px;
}

.contact-value {
    font-size: 0.9rem;
    color: var(--color-dark);
}

a.contact-value:hover {
    color: var(--color-gold);
}

/* === Footer === */
.footer {
    background: var(--color-dark);
    padding: 64px 0 32px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--color-white);
}

.footer-logo-sub {
    font-family: var(--font-display);
    font-size: 0.6rem;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 0.1em;
}

.footer-nav {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-nav a {
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.5);
}

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

.footer-bottom {
    padding-top: 24px;
    text-align: center;
}

.copyright {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.3);
    letter-spacing: 0.05em;
}

/* === Animations === */
.animate-in {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Responsive === */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        background: rgba(26, 26, 46, 0.98);
        backdrop-filter: blur(20px);
        gap: 32px;
        transition: var(--transition-base);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu .nav-link {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.85);
    }

    .navbar.scrolled .nav-menu .nav-link {
        color: rgba(255, 255, 255, 0.85);
    }

    .hamburger.active .bar {
        background: var(--color-white);
    }

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

    .about-card {
        padding: 36px 28px;
    }

    .service-item {
        flex-direction: column;
        gap: 16px;
        padding: 36px 28px;
    }

    .service-number {
        font-size: 2rem;
    }

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

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-nav {
        justify-content: center;
        gap: 16px;
    }

    .company-table th,
    .company-table td {
        padding: 16px 20px;
    }

    .company-table th {
        width: 110px;
        font-size: 0.8rem;
    }

    .company-table td {
        font-size: 0.85rem;
    }

    .contact-item {
        padding: 20px 24px;
    }

    .message-wrapper {
        padding: 40px 24px;
    }
}

@media (max-width: 480px) {
    .hero-title-main {
        letter-spacing: 0.1em;
    }

    .section-header {
        margin-bottom: 48px;
    }

    .service-features {
        flex-direction: column;
    }

    .service-features li {
        text-align: center;
    }
}

/* === Particle Styles === */
.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    animation: float linear infinite;
}

@keyframes float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}