/* ===================================
   Project006: 建設・リフォーム・不動産
   CSS Design System
   =================================== */

/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --color-primary: #1a365d;
    /* Navy - Trust & Stability */
    --color-primary-light: #2c5282;
    --color-primary-dark: #1a202c;
    --color-secondary: #c9a227;
    /* Gold - Premium Quality */
    --color-secondary-light: #d4af37;
    --color-accent: #2d6a4f;
    /* Dark Green - Nature */
    --color-accent-light: #40916c;

    /* Neutrals */
    --color-white: #ffffff;
    --color-light: #f7fafc;
    --color-gray-100: #edf2f7;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e0;
    --color-gray-400: #a0aec0;
    --color-gray-500: #718096;
    --color-gray-600: #4a5568;
    --color-gray-700: #2d3748;
    --color-gray-800: #1a202c;
    --color-dark: #0d1421;

    /* Typography */
    --font-main: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-en: 'Montserrat', sans-serif;

    /* Spacing */
    --header-height: 80px;
    --section-padding: 100px;

    /* Border Radius */
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 3px;
    --radius-xl: 3px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-gray-700);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

/* ===== Layout ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: var(--section-padding) 0;
}

.bg-light {
    background: var(--color-light);
}

.bg-dark {
    background: var(--color-primary-dark);
    color: var(--color-white);
}

.text-center {
    text-align: center;
}

/* ===== Typography ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 10px;
    line-height: 1.3;
}

.section-subtitle {
    font-family: var(--font-en);
    font-size: 0.85rem;
    color: var(--color-secondary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-weight: 600;
}

.section-lead {
    font-size: 1.1rem;
    color: var(--color-gray-600);
    margin-top: 20px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 40px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--color-secondary-light);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

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

.btn-lg {
    padding: 20px 50px;
    font-size: 1.1rem;
}

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

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

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 35px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-gray-700);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: var(--transition);
}

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

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

.nav-btn .btn {
    padding: 12px 28px;
    font-size: 0.9rem;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-primary);
}

/* ===== Hero Section ===== */
.hero {
    margin-top: var(--header-height);
    height: 90vh;
    min-height: 600px;
    background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.85)), url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?w=2000&q=85') center/cover;
    display: flex;
    align-items: center;
    color: var(--color-white);
    position: relative;
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
}

.hero-tag {
    display: inline-block;
    background: var(--color-secondary);
    color: var(--color-white);
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 25px;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 25px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-text {
    font-size: 1.2rem;
    opacity: 0.95;
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* Page Hero (Sub-pages) */
.page-hero {
    margin-top: var(--header-height);
    height: 350px;
    min-height: 300px;
    background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.85)), url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?w=2000&q=85') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-white);
}

.page-hero-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-hero-content p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ===== Statistics Section ===== */
.stats-section {
    background: var(--color-primary);
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
    color: var(--color-white);
}

.stat-item .stat-number {
    font-family: var(--font-en);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-secondary);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-item .stat-number span {
    font-size: 1.5rem;
}

.stat-item .stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* ===== Service Cards ===== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-card-img {
    height: 220px;
    overflow: hidden;
}

.service-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.service-card:hover .service-card-img img {
    transform: scale(1.05);
}

.service-card-content {
    padding: 30px;
}

.service-card-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.service-card-text {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    margin-bottom: 20px;
}

.service-card-link {
    color: var(--color-secondary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

/* ===== Works Grid ===== */
.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.work-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.work-card-img {
    height: 350px;
    overflow: hidden;
}

.work-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.work-card:hover .work-card-img img {
    transform: scale(1.05);
}

.work-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 25px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--color-white);
}

.work-card-category {
    display: inline-block;
    background: var(--color-secondary);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.work-card-title {
    font-size: 1.2rem;
    font-weight: 700;
}

/* ===== Features Section ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 25px;
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.feature-text {
    font-size: 0.95rem;
    color: var(--color-gray-600);
}

/* ===== Testimonials ===== */
.testimonial-card {
    background: var(--color-white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
}

.testimonial-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 5px;
}

.testimonial-info span {
    font-size: 0.9rem;
    color: var(--color-gray-500);
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-gray-700);
}

/* ===== News List ===== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-item {
    display: flex;
    align-items: center;
    gap: 25px;
    padding: 20px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.news-date {
    font-family: var(--font-en);
    font-size: 0.9rem;
    color: var(--color-gray-500);
    min-width: 100px;
}

.news-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.news-title {
    flex: 1;
    font-weight: 600;
    color: var(--color-gray-700);
}

.news-title:hover {
    color: var(--color-primary);
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    padding: 100px 0;
    text-align: center;
    color: var(--color-white);
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-text {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
    background: var(--color-dark);
    color: var(--color-gray-400);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-info .footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 20px;
    display: block;
}

.footer-info p {
    font-size: 0.9rem;
    line-height: 2;
}

.footer-links h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-secondary);
    display: inline-block;
}

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

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-gray-400);
}

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

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--color-gray-700);
    font-size: 0.85rem;
}

/* ===== Form Styles ===== */
.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-gray-700);
}

.form-control {
    width: 100%;
    padding: 15px 20px;
    font-size: 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}

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

/* ===== Sticky Footer CTA (Mobile) ===== */
.sticky-footer {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--color-white);
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    padding: 12px 15px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
}

.sticky-footer-inner {
    display: flex;
    gap: 10px;
    max-width: 500px;
    margin: 0 auto;
}

.sticky-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 10px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.9rem;
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.sticky-btn.cta {
    background: var(--color-secondary);
    color: var(--color-white);
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {

    /* Header */
    .menu-toggle {
        display: block;
        position: absolute;
        right: 20px;
        top: 25px;
    }

    .header-inner {
        justify-content: flex-start;
        position: relative;
    }

    .logo {
        margin: 0;
    }

    nav {
        position: absolute;
        width: 0;
        height: 0;
        overflow: visible;
    }

    .nav-list {
        position: fixed;
        top: var(--header-height);
        right: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: var(--color-white);
        flex-direction: column;
        padding: 40px 20px;
        gap: 25px;
        transition: var(--transition);
    }

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

    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 999;
    }

    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* Grids to single column */
    .stats-grid,
    .service-grid,
    .works-grid,
    .features-grid,
    .footer-grid {
        grid-template-columns: 1fr !important;
        gap: 30px;
    }

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

    /* Hero */
    .hero {
        height: auto;
        min-height: 500px;
        padding: 80px 20px;
    }

    .hero-title {
        font-size: 1.8rem !important;
    }

    .hero-text {
        font-size: 0.95rem;
        margin-bottom: 30px;
    }

    .hero-tag {
        font-size: 0.75rem;
        padding: 6px 14px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    /* Page Hero */
    .page-hero {
        height: 280px !important;
        min-height: 250px;
    }

    .page-hero-content h1 {
        font-size: 1.8rem;
    }

    /* Section */
    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.6rem !important;
    }

    .section-header {
        margin-bottom: 40px;
    }

    /* CTA */
    .cta-title {
        font-size: 1.6rem;
    }

    .cta-text {
        font-size: 0.95rem;
    }

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

    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }

    /* Sticky Footer */
    .sticky-footer {
        display: block;
    }

    body {
        padding-bottom: 85px;
    }

    /* Hide on mobile */
    .hide-mobile {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr !important;
    }

    .stat-item .stat-number {
        font-size: 2.5rem;
    }

    /* Gallery grid */
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr) !important;
    }

    /* Contact info grid */
    .contact-info-grid {
        grid-template-columns: 1fr !important;
    }

    /* Testimonials grid - one column */
    .testimonials-grid {
        grid-template-columns: 1fr !important;
    }

    /* Voice header - stack image and text */
    .voice-header {
        flex-direction: column !important;
        text-align: center;
    }

    .voice-header img {
        margin: 0 auto 15px;
    }

    /* News item - stack */
    .news-item {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 10px !important;
    }

    .news-date {
        min-width: auto !important;
    }

    /* About page grids */
    .message-grid,
    .access-grid {
        grid-template-columns: 1fr !important;
        gap: 30px !important;
    }

    .philosophy-grid {
        grid-template-columns: 1fr !important;
    }

    /* Services page - service detail grids */
    .service-detail-grid {
        grid-template-columns: 1fr !important;
        gap: 30px !important;
    }

    .service-detail-grid>div {
        order: 0 !important;
    }

    .service-detail-grid>div:has(img) {
        order: -1 !important;
    }

    /* Workflow steps - keep number next to heading */
    .section [style*="display: flex"][style*="gap: 30px"][style*="align-items: flex-start"] {
        flex-wrap: wrap !important;
        gap: 15px !important;
    }

    .section [style*="display: flex"][style*="gap: 30px"][style*="align-items: flex-start"]>div:first-child {
        width: 50px !important;
        height: 50px !important;
        font-size: 1.2rem !important;
    }

    .section [style*="display: flex"][style*="gap: 30px"][style*="align-items: flex-start"]>div:last-child {
        flex: 1;
        min-width: 200px;
    }

    /* Feature checks grid */
    [style*="grid-template-columns: repeat(2, 1fr)"][style*="gap: 15px"] {
        grid-template-columns: 1fr !important;
    }

    /* Form padding */
    form {
        padding: 30px 20px !important;
    }

    /* Table responsive */
    table th,
    table td {
        display: block;
        width: 100% !important;
    }

    table th {
        padding: 10px 15px !important;
    }

    table td {
        padding: 10px 15px 15px !important;
    }

    /* Navigation buttons stack */
    [style*="justify-content: space-between"] {
        flex-direction: column !important;
        gap: 15px;
    }

    /* CTA title smaller */
    .cta-title {
        font-size: 1.4rem !important;
    }

    /* Section title for left-aligned pages */
    .section-title[style*="text-align: left"] {
        font-size: 1.5rem !important;
    }
}