/* ============================================
   Liver Commerce Japan - スタイルシート
   洗練された信頼性のあるデザイン
   ============================================ */

/* ----- CSS Variables ----- */
:root {
    /* カラーパレット */
    --color-primary: #1E3A5F;
    --color-primary-dark: #152B47;
    --color-primary-light: #2A4D7A;
    --color-accent: #FF6B35;
    --color-accent-light: #FF8C5A;
    --color-accent-gradient: linear-gradient(135deg, #FF6B35 0%, #F7931E 100%);

    --color-bg: #FAFBFC;
    --color-bg-alt: #F0F4F8;
    --color-bg-dark: #1E3A5F;

    --color-text: #2D3748;
    --color-text-light: #718096;
    --color-text-lighter: #A0AEC0;
    --color-text-on-dark: #FFFFFF;
    --color-text-on-dark-muted: rgba(255, 255, 255, 0.7);

    /* タイポグラフィ */
    --font-family-en: 'Outfit', sans-serif;
    --font-family-ja: 'Noto Sans JP', sans-serif;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* ボーダー・シャドウ */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);

    /* トランジション */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* レイアウト */
    --header-height: 80px;
    --container-max: 1200px;
    --container-padding: 24px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-family-ja);
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

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

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

/* ----- Section Header ----- */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-label {
    display: inline-block;
    font-family: var(--font-family-en);
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-family-ja);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: 1.4;
    color: var(--color-primary);
}

.section-header--light .section-title {
    color: var(--color-text-on-dark);
}

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

/* ============================================
   HEADER
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    background: transparent;
    transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.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;
}

.header__logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-family: var(--font-family-en);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-on-dark);
    letter-spacing: 0.02em;
    transition: color var(--transition-base);
}

.header.scrolled .logo-text {
    color: var(--color-primary);
}

.header__nav {
    display: none;
}

@media (min-width: 768px) {
    .header__nav {
        display: block;
    }
}

.nav-list {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-family: var(--font-family-en);
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-text-on-dark);
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transition-base);
    display: inline-block;
}

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

.nav-link:hover::after {
    transform: scaleX(1);
}

.header.scrolled .nav-link {
    color: var(--color-text);
}

/* ドロップダウンメニュー */
.nav-item {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-md);
    min-width: 200px;
    padding: var(--spacing-xs) 0;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 1001;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family-en);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
}

.dropdown-item:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-accent);
}

/* 詳細ページ用スタイル */
.page-hero {
    height: 60vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--color-primary-dark);
    overflow: hidden;
    margin-bottom: var(--spacing-3xl);
}

.page-hero__content {
    text-align: center;
    color: var(--color-text-on-dark);
    z-index: 1;
}

.page-hero__title {
    font-family: var(--font-family-en);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.1em;
}

.page-hero__subtitle {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-accent);
}

.page-content {
    padding: var(--spacing-3xl) 0;
}

.page-section {
    margin-bottom: var(--spacing-3xl);
}

.page-section h2 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
    padding-left: var(--spacing-sm);
}

.breadcrumb {
    padding: var(--spacing-md) 0;
    background: var(--color-bg-alt);
}

.breadcrumb__list {
    display: flex;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.breadcrumb__item+.breadcrumb__item::before {
    content: '/';
    margin-right: var(--spacing-xs);
    color: var(--color-text-lighter);
}

/* ハンバーガーメニュー */
.header__hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

@media (min-width: 768px) {
    .header__hamburger {
        display: none;
    }
}

.header__hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-on-dark);
    transition: all var(--transition-base);
}

.header.scrolled .header__hamburger span {
    background: var(--color-text);
}

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

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

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

/* モバイルメニュー */
.mobile-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-list {
    text-align: center;
}

.mobile-nav-link {
    display: block;
    font-family: var(--font-family-en);
    font-size: var(--font-size-2xl);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    padding: var(--spacing-md);
    transition: color var(--transition-base);
}

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

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

.hero__background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero__gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
            var(--color-primary-dark) 0%,
            var(--color-primary) 50%,
            var(--color-primary-light) 100%);
}

.hero__gradient::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: linear-gradient(135deg,
            transparent 0%,
            rgba(255, 107, 53, 0.15) 50%,
            rgba(255, 107, 53, 0.25) 100%);
    clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
}

.hero__particles {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        radial-gradient(circle at 40% 80%, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 100px 100px, 150px 150px, 80px 80px;
    animation: particleFloat 20s ease-in-out infinite;
}

@keyframes particleFloat {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(-20px, -10px);
    }
}

.hero__content {
    text-align: center;
    padding: var(--spacing-lg);
    max-width: 900px;
}

.hero__subtitle {
    font-family: var(--font-family-en);
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 0.3em;
    color: var(--color-text-on-dark-muted);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
}

.hero__title {
    margin-bottom: var(--spacing-xl);
}

.hero__title-main {
    display: block;
    font-family: var(--font-family-en);
    font-size: clamp(2rem, 6vw, var(--font-size-5xl));
    font-weight: 700;
    color: var(--color-text-on-dark);
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero__title-sub {
    display: block;
    font-family: var(--font-family-ja);
    font-size: clamp(1.25rem, 3vw, var(--font-size-2xl));
    font-weight: 500;
    color: var(--color-text-on-dark-muted);
    letter-spacing: 0.1em;
}

.hero__scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.hero__scroll-indicator span {
    font-family: var(--font-family-en);
    font-size: var(--font-size-xs);
    letter-spacing: 0.2em;
    color: var(--color-text-on-dark-muted);
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-text-on-dark-muted), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {

    0%,
    100% {
        transform: scaleY(1);
        opacity: 1;
    }

    50% {
        transform: scaleY(0.7);
        opacity: 0.5;
    }
}

/* フェードインアニメーション */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in:nth-child(2) {
    animation-delay: 0.2s;
}

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

/* ============================================
   CONCEPT SECTION
   ============================================ */
.concept {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg);
}

.concept__content {
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
    text-align: center;
}

.concept__lead {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.concept__text {
    font-size: var(--font-size-base);
    line-height: 2;
    color: var(--color-text-light);
}

.concept__visual {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.concept__card {
    background: var(--color-bg);
    border: 1px solid rgba(30, 58, 95, 0.1);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.concept__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.concept__card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 50%;
    color: var(--color-text-on-dark);
}

.concept__card h3 {
    font-family: var(--font-family-en);
    font-size: var(--font-size-lg);
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.concept__card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ============================================
   SOLUTIONS SECTION
   ============================================ */
.solutions {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.solutions__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.solution-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.solution-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.solution-card__image-wrapper {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.solution-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.solution-card:hover .solution-card__image {
    transform: scale(1.05);
}

.solution-card__number {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 12px;
    border-radius: 20px;
    font-family: var(--font-family-en);
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

.solution-card__content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.solution-card__title {
    font-family: var(--font-family-en);
    font-size: var(--font-size-xl);
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--color-text-on-dark);
    margin-bottom: var(--spacing-sm);
}

.solution-card__desc {
    font-size: var(--font-size-sm);
    line-height: 1.8;
    color: var(--color-text-on-dark-muted);
}

/* ============================================
   COMPANY SECTION
   ============================================ */
.company {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-alt);
}

.company__message {
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
    background: var(--color-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
}

.company__message-title {
    font-family: var(--font-family-en);
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.company__message-content h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.company__message-content p {
    font-size: var(--font-size-base);
    line-height: 2;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.company__message-content p:last-child {
    margin-bottom: 0;
}

.company__info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.company__details,
.company__contact {
    background: var(--color-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.company__details h3,
.company__contact h3 {
    font-family: var(--font-family-ja);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-accent);
}

.company__details ul {
    counter-reset: list-counter;
}

.company__details li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    line-height: 1.8;
}

.company__details li::before {
    counter-increment: list-counter;
    content: counter(list-counter) ".";
    position: absolute;
    left: 0;
    font-family: var(--font-family-en);
    font-weight: 600;
    color: var(--color-accent);
}

.company__phone {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-family-en);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-primary);
    transition: color var(--transition-base);
}

.company__phone:hover {
    color: var(--color-accent);
}

.company__phone svg {
    color: var(--color-accent);
}

/* 会社概要テーブル */
.company__table-wrapper {
    max-width: 900px;
    margin: 0 auto var(--spacing-2xl);
    background: var(--color-bg);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.company__table {
    width: 100%;
    border-collapse: collapse;
}

.company__table th,
.company__table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid rgba(30, 58, 95, 0.1);
}

.company__table tr:last-child th,
.company__table tr:last-child td {
    border-bottom: none;
}

.company__table th {
    width: 150px;
    background: var(--color-primary);
    color: var(--color-text-on-dark);
    font-weight: 500;
    font-size: var(--font-size-sm);
    vertical-align: top;
}

.company__table td {
    color: var(--color-text);
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.company__table td a {
    color: var(--color-primary);
    font-weight: 500;
    transition: color var(--transition-base);
}

.company__table td a:hover {
    color: var(--color-accent);
}

/* アクセスセクション */
.company__access {
    max-width: 900px;
    margin: 0 auto;
}

.company__access-title {
    font-family: var(--font-family-en);
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.company__map {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.company__map iframe {
    display: block;
}

/* Solution Card Image Wrapper (Already defined above) */

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--spacing-lg) 0;
    background: var(--color-primary-dark);
    text-align: center;
}

.footer__copyright {
    font-family: var(--font-family-en);
    font-size: var(--font-size-xs);
    letter-spacing: 0.1em;
    color: var(--color-text-on-dark-muted);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    :root {
        --container-padding: 16px;
        --header-height: 64px;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .section-header {
        margin-bottom: var(--spacing-2xl);
    }

    .concept,
    .solutions,
    .company {
        padding: var(--spacing-2xl) 0;
    }

    .concept__visual {
        gap: var(--spacing-md);
    }

    .concept__card {
        padding: var(--spacing-lg);
    }

    .solutions__grid {
        gap: var(--spacing-md);
    }

    .solution-card {
        padding: var(--spacing-lg);
    }

    .company__message {
        padding: var(--spacing-lg);
    }

    .company__message-content h4 {
        font-size: var(--font-size-lg);
    }

    .company__details,
    .company__contact {
        padding: var(--spacing-lg);
    }

    .company__phone {
        font-size: var(--font-size-xl);
    }

    /* テーブルのモバイル対応 */
    .company__table th {
        width: 120px;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .company__table td {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .company__map iframe {
        height: 300px;
    }
}

/* スクロール時のアニメーション用 */
.scroll-fade {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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