/* ========================================
   株式会社YSG - Corporate Website Styles
   ======================================== */

/* CSS Variables */
:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    --font-serif: 'TsukuMinPr5-R', 'Noto Serif JP', serif;
    --font-serif-en: 'Mrs Eaves', 'Cormorant Garamond', serif;
    --font-sans: 'Outfit', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Outfit', sans-serif;
    
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    --header-height: 80px;
    --container-max: 1200px;
    --container-padding: 24px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-serif);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

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

.logo-img {
    height: 40px;
    width: auto;
}

.footer-logo-img {
    height: 50px;
    width: auto;
}

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

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition-base);
}

.header.scrolled {
    border-bottom-color: var(--color-gray-200);
}

.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-text {
    font-family: var(--font-serif-en);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-black);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-list a {
    font-family: var(--font-serif-en);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-gray-700);
    transition: var(--transition-fast);
    position: relative;
}

.nav-list a:not(.nav-contact)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-black);
    transition: var(--transition-base);
}

.nav-list a:not(.nav-contact):hover::after {
    width: 100%;
}

.nav-list a:hover {
    color: var(--color-black);
}

.nav-contact {
    padding: 10px 24px;
    background: var(--color-black);
    color: var(--color-white) !important;
    border-radius: 4px;
    transition: var(--transition-base);
}

.nav-contact:hover {
    background: var(--color-gray-800);
    transform: translateY(-2px);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

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

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ========================================
   Hero Section - Text Animation
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--color-black);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-image {
    position: absolute;
    inset: 0;
    background: url('../images/hero-bg.jpg') center center / cover no-repeat;
    background-color: var(--color-gray-900);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 0 var(--container-padding);
    padding-left: 8%;
    max-width: 100%;
    width: 100%;
}

/* メインタイトル - 1文字ずつアニメーション */
.hero-title {
    margin-bottom: 40px;
}

.hero-title-line {
    display: block;
    font-family: var(--font-serif-en);
    font-weight: 500;
    font-style: italic;
    letter-spacing: 0.02em;
    font-size: clamp(48px, 12vw, 140px);
    line-height: 1.05;
    color: var(--color-white);
    overflow: hidden;
}

.hero-title-line .char {
    display: inline-block;
    opacity: 0;
    transform: translateY(100%);
    animation: charReveal 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* 各文字のディレイを設定 */
.hero-title-line:nth-child(1) .char:nth-child(1) { animation-delay: 0.1s; }
.hero-title-line:nth-child(1) .char:nth-child(2) { animation-delay: 0.15s; }
.hero-title-line:nth-child(1) .char:nth-child(3) { animation-delay: 0.2s; }
.hero-title-line:nth-child(1) .char:nth-child(4) { animation-delay: 0.25s; }
.hero-title-line:nth-child(1) .char:nth-child(5) { animation-delay: 0.3s; }
.hero-title-line:nth-child(1) .char:nth-child(6) { animation-delay: 0.35s; }
.hero-title-line:nth-child(1) .char:nth-child(7) { animation-delay: 0.4s; }
.hero-title-line:nth-child(1) .char:nth-child(8) { animation-delay: 0.45s; }

.hero-title-line:nth-child(2) .char:nth-child(1) { animation-delay: 0.5s; }
.hero-title-line:nth-child(2) .char:nth-child(2) { animation-delay: 0.55s; }
.hero-title-line:nth-child(2) .char:nth-child(3) { animation-delay: 0.6s; }
.hero-title-line:nth-child(2) .char:nth-child(4) { animation-delay: 0.65s; }
.hero-title-line:nth-child(2) .char:nth-child(5) { animation-delay: 0.7s; }
.hero-title-line:nth-child(2) .char:nth-child(6) { animation-delay: 0.75s; }

.hero-title-line:nth-child(3) .char:nth-child(1) { animation-delay: 0.8s; }
.hero-title-line:nth-child(3) .char:nth-child(2) { animation-delay: 0.85s; }
.hero-title-line:nth-child(3) .char:nth-child(3) { animation-delay: 0.9s; }
.hero-title-line:nth-child(3) .char:nth-child(4) { animation-delay: 0.95s; }
.hero-title-line:nth-child(3) .char:nth-child(5) { animation-delay: 1.0s; }

@keyframes charReveal {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* サブテキスト - 行ごとにアニメーション */
.hero-sub {
    margin-bottom: 48px;
}

.hero-sub-line {
    font-size: clamp(14px, 2vw, 18px);
    font-family: var(--font-serif);
    line-height: 2;
    color: var(--color-gray-300);
    opacity: 0;
    transform: translateY(20px);
    animation: subLineReveal 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.hero-sub-line:nth-child(1) { animation-delay: 1.2s; }
.hero-sub-line:nth-child(2) { animation-delay: 1.35s; }
.hero-sub-line:nth-child(3) { animation-delay: 1.5s; }
.hero-sub-line:nth-child(4) { animation-delay: 1.65s; }

@keyframes subLineReveal {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* CTAボタン */
.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 2s;
}

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

/* Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: 40px;
    right: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: fadeIn 1s ease forwards;
    animation-delay: 2.5s;
    opacity: 0;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.hero-scroll span {
    font-family: var(--font-serif-en);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gray-400);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-gray-400), transparent);
    animation: scrollLine 2s ease infinite;
    animation-delay: 2.5s;
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.5); opacity: 0.5; }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-family: var(--font-serif-en);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.05em;
    border-radius: 4px;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-gray-100);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    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, 0.5);
}

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

.btn-white:hover {
    background: var(--color-gray-100);
    transform: translateY(-2px);
}

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

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

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

.btn-black:hover {
    background: var(--color-gray-800);
    transform: translateY(-2px);
}

/* ========================================
   Section Headers
   ======================================== */
.section-header {
    margin-bottom: 64px;
}

.section-label {
    display: inline-block;
    font-family: var(--font-serif-en);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gray-500);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.section-header-light .section-label {
    color: var(--color-gray-400);
}

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

/* ========================================
   About Section
   ======================================== */
.about {
    padding: 140px 0;
    background: var(--color-white);
}

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

.about-lead {
    font-size: 24px;
    font-weight: 500;
    line-height: 1.8;
    color: var(--color-black);
    margin-bottom: 32px;
}

.about-description {
    font-size: 15px;
    line-height: 2;
    color: var(--color-gray-600);
    margin-bottom: 20px;
}

.about-visual {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.about-card {
    padding: 40px;
    background: var(--color-gray-50);
    border-radius: 8px;
    transition: var(--transition-base);
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.about-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-black);
    border-radius: 8px;
    margin-bottom: 24px;
}

.about-card-icon svg {
    stroke: var(--color-white);
}

.about-card h3 {
    font-family: var(--font-serif-en);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-black);
}

.about-card p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-gray-600);
}

/* ========================================
   Services Section
   ======================================== */
.services {
    padding: 140px 0;
    background: var(--color-black);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.service-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 48px;
    background: var(--color-gray-900);
    border-radius: 12px;
    border: 1px solid var(--color-gray-800);
    transition: var(--transition-slow);
    overflow: hidden;
}

.service-card:nth-child(1) {
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('../images/service-ad.jpg') center center / cover no-repeat;
}

.service-card:nth-child(2) {
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('../images/service-studio.jpg') center center / cover no-repeat;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-white), transparent);
    opacity: 0;
    transition: var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-gray-700);
}

.service-card:hover::before {
    opacity: 1;
}

.service-card-number {
    font-family: var(--font-serif-en);
    font-size: 64px;
    font-weight: 700;
    color: var(--color-gray-800);
    line-height: 1;
    margin-bottom: 24px;
}

.service-card-content {
    flex: 1;
}

.service-card h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
}

.service-card p {
    font-size: 14px;
    line-height: 1.9;
    color: var(--color-gray-400);
    margin-bottom: 24px;
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.service-features li {
    padding: 6px 14px;
    background: var(--color-gray-800);
    border-radius: 4px;
    font-size: 12px;
    color: var(--color-gray-300);
}

.service-card-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-serif-en);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-gray-400);
    transition: var(--transition-base);
}

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

.service-card-link svg {
    transition: var(--transition-base);
}

.service-card:hover .service-card-link svg {
    transform: translateX(4px);
}

/* ========================================
   Company Section
   ======================================== */
.company {
    padding: 140px 0;
    background: var(--color-gray-50);
}

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

.company-table tr {
    border-bottom: 1px solid var(--color-gray-200);
}

.company-table th,
.company-table td {
    padding: 24px 0;
    text-align: left;
    vertical-align: top;
}

.company-table th {
    width: 180px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-500);
}

.company-table td {
    font-size: 15px;
    color: var(--color-gray-800);
}

.company-table td a {
    color: var(--color-black);
    border-bottom: 1px solid var(--color-gray-300);
    transition: var(--transition-fast);
}

.company-table td a:hover {
    border-bottom-color: var(--color-black);
}

.business-list li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 1.8;
}

.business-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 4px;
    height: 4px;
    background: var(--color-gray-400);
    border-radius: 50%;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    position: relative;
    padding: 120px 0;
    background: var(--color-black);
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
}

.cta-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 60% at 50% 50%, rgba(60, 60, 60, 0.3) 0%, transparent 70%);
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.cta-title {
    font-family: var(--font-serif);
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
}

.cta-text {
    font-size: 15px;
    line-height: 2;
    color: var(--color-gray-400);
    margin-bottom: 40px;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--color-gray-900);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--color-gray-800);
}

.footer-logo {
    display: inline-block;
    margin-bottom: 24px;
}

.footer-address {
    font-size: 13px;
    line-height: 2;
    color: var(--color-gray-500);
}

.footer-nav {
    display: flex;
    gap: 80px;
}

.footer-nav-group h4 {
    font-family: var(--font-serif-en);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray-400);
    margin-bottom: 20px;
}

.footer-nav-group ul li {
    margin-bottom: 12px;
}

.footer-nav-group a {
    font-size: 14px;
    color: var(--color-gray-500);
    transition: var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 40px;
}

.copyright {
    font-size: 12px;
    color: var(--color-gray-600);
    text-align: center;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
        --container-padding: 20px;
    }
    
    /* ===== Mobile Nav - Right Slide Fullscreen ===== */
    .nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        height: 100%;
        height: 100dvh;
        background: var(--color-black);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 999;
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                    opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                    visibility 0.4s;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .nav.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 36px;
        padding: 40px 24px;
    }
    
    .nav-list a {
        font-size: 28px;
        font-weight: 500;
        color: var(--color-white);
        letter-spacing: 0.08em;
    }

    .nav-list a:not(.nav-contact)::after {
        background: var(--color-white);
    }
    
    .nav-contact {
        margin-top: 20px;
        padding: 14px 40px;
        background: var(--color-white);
        color: var(--color-black) !important;
        font-size: 16px !important;
        border-radius: 6px;
    }

    .nav-contact:hover {
        background: var(--color-gray-200);
    }

    /* Hamburger stays on top of nav overlay */
    .menu-toggle {
        z-index: 1001;
    }

    /* When menu is open, hamburger lines turn white */
    .menu-toggle.active span {
        background: var(--color-white);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    /* Hero スマホ対応 */
    .hero-content {
        padding-left: var(--container-padding);
        padding-right: var(--container-padding);
    }
    
    .hero-title-line {
        font-size: clamp(36px, 14vw, 80px);
    }
    
    .hero-sub-line {
        font-size: 14px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .hero-cta .btn {
        width: auto;
    }
    
    .about,
    .services,
    .company {
        padding: 80px 0;
    }
    
    .section-header {
        margin-bottom: 48px;
    }
    
    .about-lead {
        font-size: 20px;
    }
    
    .about-lead br {
        display: none;
    }
    
    .service-card {
        padding: 32px;
    }
    
    .service-card-number {
        font-size: 48px;
    }
    
    .service-card h3 {
        font-size: 24px;
    }
    
    .company-table th {
        width: 120px;
        font-size: 13px;
    }
    
    .company-table td {
        font-size: 14px;
    }
    
    .cta {
        padding: 80px 0;
    }
    
    .cta-text br {
        display: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-nav {
        gap: 48px;
    }
}

@media (max-width: 480px) {
    .hero-title-line {
        font-size: clamp(32px, 16vw, 60px);
    }
    
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-scroll {
        right: 20px;
        bottom: 20px;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-actions .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* リフォームカードの背景画像 */
.service-card:nth-child(3) {
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('../images/service-reform.jpg') center center / cover no-repeat;
}