@charset "UTF-8";

/* =========================================
   INGS Inc. - Premium Renovation Website
   Modern Japanese Craftsmanship Aesthetic
   ========================================= */

/* =========================================
   Google Fonts Import
   ========================================= */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700&family=Zen+Kaku+Gothic+New:wght@400;500;700&family=Shippori+Mincho:wght@400;500;600&display=swap');

/* =========================================
   CSS Variables - Design System
   ========================================= */
:root {
    /* Primary Colors - Warm Wood & Earth Tones */
    --color-primary: #2C3E50;        /* Deep navy - trust */
    --color-primary-dark: #1a252f;
    --color-accent: #C17F59;         /* Warm copper/wood */
    --color-accent-hover: #A66B48;
    --color-accent-light: #E8D4C8;
    
    /* Secondary Colors */
    --color-success: #27AE60;
    --color-warm: #D4A373;
    
    /* Neutral Colors */
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-bg: #FAFAF8;
    --color-bg-warm: #F5F3F0;
    --color-white: #FFFFFF;
    --color-border: #E5E2DE;
    --color-border-light: #F0EDE8;
    
    /* Typography */
    --font-heading: 'Shippori Mincho', 'Hiragino Mincho ProN', serif;
    --font-body: 'Zen Kaku Gothic New', 'Noto Sans JP', 'Hiragino Sans', sans-serif;
    --font-accent: 'Noto Sans JP', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(44, 62, 80, 0.06);
    --shadow-md: 0 4px 20px rgba(44, 62, 80, 0.08);
    --shadow-lg: 0 8px 40px rgba(44, 62, 80, 0.12);
    --shadow-accent: 0 8px 30px rgba(193, 127, 89, 0.25);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 50px;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.9;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: var(--color-accent-light);
    color: var(--color-primary-dark);
}

/* Links */
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

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

/* Lists */
ul, ol {
    list-style: none;
}

/* =========================================
   Header - Sticky Navigation
   ========================================= */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
    transition: var(--transition-medium);
}

header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo a {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    position: relative;
}

.logo a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-accent);
}

/* Desktop Navigation */
nav ul {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

nav ul li a {
    font-family: var(--font-accent);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-light);
    padding: var(--space-xs) 0;
    position: relative;
    letter-spacing: 0.02em;
}

nav ul li a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition-fast);
}

nav ul li a:hover {
    color: var(--color-primary);
}

nav ul li a:hover::before {
    width: 100%;
}

/* Contact Button in Nav */
nav ul li:last-child a {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
}

nav ul li:last-child a::before {
    display: none;
}

nav ul li:last-child a:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-fast);
    transform-origin: center;
}

.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
   ========================================= */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    overflow: hidden;
    margin-top: 0;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5" x="0" y="0" width="20" height="20"/></svg>') repeat,
        linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.3) 100%);
    background-size: 50px 50px, 100% 100%;
}

/* Decorative Elements */
.hero-section::after {
    content: '';
    position: absolute;
    top: 20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(193, 127, 89, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--space-xl);
    max-width: 900px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 500;
    color: var(--color-white);
    line-height: 1.3;
    margin-bottom: var(--space-md);
    letter-spacing: 0.08em;
    text-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.hero-content p {
    font-family: var(--font-body);
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.hero-tagline {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.875rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.3em;
    margin-bottom: var(--space-md);
    padding: var(--space-xs) var(--space-md);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-full);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

.scroll-indicator::after {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
}

/* =========================================
   Main Layout
   ========================================= */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-2xl);
    align-items: start;
}

main {
    min-width: 0;
}

/* Spacer for fixed header */
body > header + .hero-section {
    margin-top: 0;
}

body > header + .container,
body > header + div:not(.hero-section) {
    padding-top: calc(80px + var(--space-2xl));
}

/* =========================================
   Typography
   ========================================= */
.page-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    position: relative;
    letter-spacing: 0.05em;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), transparent);
}

h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
    padding-left: var(--space-md);
    border-left: 3px solid var(--color-accent);
    line-height: 1.5;
    letter-spacing: 0.03em;
}

h3 {
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

p {
    margin-bottom: var(--space-md);
    color: var(--color-text-light);
}

.lead-text {
    font-size: 1.125rem;
    line-height: 2;
    color: var(--color-text);
}

/* =========================================
   Buttons
   ========================================= */
.btn-primary,
.btn-contact,
.btn-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    background: var(--color-primary);
    color: var(--color-white);
    font-family: var(--font-accent);
    font-size: 0.9375rem;
    font-weight: 600;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
    box-shadow: var(--shadow-md);
    min-width: 200px;
    text-align: center;
}

.btn-primary:hover,
.btn-contact:hover,
.btn-submit:hover {
    background: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-accent);
    color: var(--color-white);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    background: transparent;
    color: var(--color-white);
    font-family: var(--font-accent);
    font-size: 0.9375rem;
    font-weight: 600;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-full);
    border: 2px solid rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition-medium);
}

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

/* =========================================
   Cards - "3つの約束" etc.
   ========================================= */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.card {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
    transition: var(--transition-medium);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-warm));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-medium);
}

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

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

.card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

/* =========================================
   Service Box
   ========================================= */
.service-box {
    background: linear-gradient(135deg, var(--color-bg-warm) 0%, var(--color-white) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin: var(--space-lg) 0;
    position: relative;
}

.service-box h3 {
    color: var(--color-primary);
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
}

/* Check List */
.check-list {
    margin: var(--space-md) 0;
}

.check-list li {
    position: relative;
    padding: var(--space-sm) 0 var(--space-sm) 2rem;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.check-list li:last-child {
    border-bottom: none;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: var(--space-sm);
    color: var(--color-accent);
    font-weight: bold;
}

.check-list li strong {
    color: var(--color-primary);
}

/* Service List */
.service-list {
    margin: var(--space-md) 0;
}

.service-list li {
    padding: var(--space-sm) 0;
    padding-left: 1.5rem;
    position: relative;
    border-bottom: 1px solid var(--color-border-light);
}

.service-list li:last-child {
    border-bottom: none;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 1.1rem;
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
}

/* =========================================
   Sidebar
   ========================================= */
aside {
    position: sticky;
    top: calc(80px + var(--space-lg));
}

.widget {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-medium);
}

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

.widget-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    padding-bottom: var(--space-sm);
    margin-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-accent);
    letter-spacing: 0.05em;
}

.widget ul li {
    border-bottom: 1px solid var(--color-border-light);
}

.widget ul li:last-child {
    border-bottom: none;
}

.widget ul li a {
    display: flex;
    align-items: center;
    padding: 0.875rem 0;
    font-size: 0.875rem;
    color: var(--color-text-light);
    transition: var(--transition-fast);
}

.widget ul li a::before {
    content: '›';
    margin-right: var(--space-xs);
    color: var(--color-accent);
    font-weight: bold;
    transition: var(--transition-fast);
}

.widget ul li a:hover {
    color: var(--color-accent);
    padding-left: var(--space-xs);
}

.widget ul li a:hover::before {
    transform: translateX(4px);
}

.widget p {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}

.widget .btn-contact {
    width: 100%;
    padding: 0.875rem;
    font-size: 0.875rem;
    min-width: auto;
}

/* =========================================
   Flow Steps - 工事の流れ
   ========================================= */
.flow-container {
    position: relative;
    margin: var(--space-xl) 0;
}

.flow-step {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    position: relative;
}

.flow-step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 50px;
    top: 80px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-border));
}

.flow-step h3 {
    font-family: var(--font-accent);
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-white);
    background: var(--color-accent);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    text-align: center;
    height: fit-content;
}

.flow-step p {
    padding-top: var(--space-xs);
    color: var(--color-text-light);
}

/* =========================================
   FAQ
   ========================================= */
.faq-list {
    margin-top: var(--space-lg);
}

.faq-list dt {
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--color-primary);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    margin-top: var(--space-md);
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.faq-list dt::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: 50%;
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-list dd {
    padding: var(--space-md);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    color: var(--color-text-light);
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.faq-list dd::before {
    content: 'A';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* =========================================
   Company Table
   ========================================= */
.company-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-lg) 0;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

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

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

.company-table th,
.company-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    vertical-align: top;
}

.company-table th {
    width: 180px;
    background: var(--color-bg-warm);
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.9375rem;
}

.company-table td {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    line-height: 1.8;
}

/* =========================================
   Contact Form
   ========================================= */
.contact-form {
    margin-top: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
    font-size: 0.9375rem;
}

.form-group .required {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    margin-left: var(--space-xs);
    font-weight: 500;
}
table.formTable,
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-white);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(193, 127, 89, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* =========================================
   Phone Box (Contact Page)
   ========================================= */
.phone-box {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    margin: var(--space-xl) 0;
    text-align: center;
}

.phone-box .label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: var(--space-xs);
}

.phone-box .number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.phone-box .hours {
    font-size: 0.8125rem;
    opacity: 0.8;
}

/* =========================================
   Footer
   ========================================= */
footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--space-2xl);
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
}

.copyright {
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
}

/* =========================================
   Note / Small Text
   ========================================= */
.note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-md);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border);
}

/* =========================================
   Section Styling
   ========================================= */
section {
    margin-bottom: var(--space-xl);
}

section h2:first-child {
    margin-top: 0;
}

/* =========================================
   Map Placeholder
   ========================================= */
.map-placeholder {
    margin-top: var(--space-lg);
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
}

/* =========================================
   Responsive - Tablet
   ========================================= */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    aside {
        position: static;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-lg);
    }
    
    .widget {
        margin-bottom: 0;
    }
}

/* =========================================
   Responsive - Mobile
   ========================================= */
@media (max-width: 768px) {
    :root {
        --space-lg: 2rem;
        --space-xl: 3rem;
        --space-2xl: 4rem;
    }
    
    /* Header */
    .header-inner {
        padding: 0 var(--space-md);
        height: 70px;
    }
    
    .logo a {
        font-size: 1.5rem;
    }
    
    /* Mobile Menu Toggle */
    .menu-toggle {
        display: flex;
    }
    
    nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-white);
        padding: 100px var(--space-lg) var(--space-lg);
        box-shadow: var(--shadow-lg);
        transition: var(--transition-medium);
        z-index: 999;
    }
    
    nav.active {
        right: 0;
    }
    
    nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    nav ul li {
        width: 100%;
        border-bottom: 1px solid var(--color-border-light);
    }
    
    nav ul li a {
        display: block;
        padding: var(--space-md) 0;
        font-size: 1rem;
    }
    
    nav ul li a::before {
        display: none;
    }
    
    nav ul li:last-child a {
        margin-top: var(--space-md);
        text-align: center;
        border-radius: var(--radius-full);
    }
    
    /* Mobile Overlay */
    .nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
    }
    
    .nav-overlay.active {
        display: block;
    }
    
    /* Hero */
    .hero-section {
        min-height: 80vh;
    }
    
    .hero-content {
        padding: var(--space-lg);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta .btn-primary,
    .hero-cta .btn-secondary {
        width: 100%;
        max-width: 280px;
    }
    
    /* Container */
    .container {
        padding: var(--space-xl) var(--space-md);
    }
    
    body > header + .container,
    body > header + div:not(.hero-section) {
        padding-top: calc(70px + var(--space-xl));
    }
    
    /* Flow Steps */
    .flow-step {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .flow-step:not(:last-child)::after {
        display: none;
    }
    
    .flow-step h3 {
        text-align: left;
    }
    
    /* Table */
    .company-table th,
    .company-table td {
        display: block;
        width: 100%;
        padding: var(--space-sm) var(--space-md);
    }
    
    .company-table th {
        border-bottom: none;
        padding-bottom: var(--space-xs);
    }
    
    .company-table td {
        padding-top: 0;
        padding-bottom: var(--space-md);
    }
    
    /* Cards */
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    /* Sidebar */
    aside {
        grid-template-columns: 1fr;
    }
}
/* =========================================
   Additions for Index Page Content
   ========================================= */

/* Highlight Text (アクセントカラーの太字) */
.text-highlight {
    font-size: 1.125rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

/* Alert Box (施主支給の注意書き用) */
.alert-box {
    background: #fff9f0; /* var(--color-bg-warm)より少し黄色味を帯びた色、または任意 */
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border-left: 5px solid var(--color-warm); /* 既存のwarmカラーを使用 */
    margin-bottom: var(--space-lg);
}

.alert-box h4 {
    font-weight: 700;
    color: var(--color-accent-hover);
    margin-bottom: var(--space-sm);
}

/* Service Grid (業務内容一覧) */
.service-summary {
    margin-top: var(--space-2xl);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.service-card {
    background: var(--color-bg-warm);
    padding: var(--space-md);
    border-top: 4px solid var(--color-accent);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    transition: var(--transition-fast);
}

.service-card:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.service-card h4 {
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.service-card .small {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Recruit Box (協力会社募集) */
.recruit-box {
    margin-top: var(--space-2xl);
    padding: var(--space-lg);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    text-align: center;
}

.recruit-box h3 {
    margin-top: 0;
    color: var(--color-primary);
}

.recruit-box p {
    text-align: left;
    margin-bottom: var(--space-lg);
}

/* Utilities / Layout Helpers */
.text-center {
    text-align: center;
}

.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.section-cta {
    text-align: center;
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
}

.section-cta p {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.footer-message {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: var(--space-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}
/* =========================================
   Print Styles
   ========================================= */
@media print {
    header, footer, aside, .hero-section {
        display: none;
    }
    
    .container {
        display: block;
        padding: 0;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
}