:root {
    --color-primary: #1a1a1a;
    --color-secondary: #4a4a4a;
    --color-accent: #808080;
    --color-text: #2a2a2a;
    --color-bg: #f5f5f5;
    --color-white: #ffffff;
    --font-main: 'Noto Serif JP', serif;
    --font-sans: 'Helvetica Neue', Arial, sans-serif;
    --border-radius: 2px;
    --shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: transparent;
    color: var(--color-text);
    line-height: 1.8;
    overflow-x: hidden;
    letter-spacing: 0.02em;
    -webkit-text-size-adjust: 100%;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

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

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

/* Header */
.site-header {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    padding-top: max(20px, env(safe-area-inset-top));
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
    filter: grayscale(100%);
}

.main-nav ul {
    display: flex;
    gap: 30px;
}

.main-nav a {
    font-weight: 400;
    font-size: 0.9rem;
    padding: 5px 0;
    border-bottom: 2px solid transparent;
    color: var(--color-text);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.main-nav a:hover {
    border-bottom-color: var(--color-primary);
}

.btn-tel {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: transparent;
    color: var(--color-primary);
    padding: 10px 25px;
    border: 1px solid var(--color-primary);
    border-radius: 0;
    font-weight: 400;
    transition: all 0.3s ease;
}

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

.tel-text {
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.tel-number {
    font-size: 1.1rem;
    line-height: 1;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-primary);
    margin: 6px 0;
    transition: all 0.3s ease-in-out;
}

/* Hamburger Animation state */
.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Hero Section */
.hero {
    padding: 120px 0 100px;
    position: relative;
    overflow: hidden;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 400;
    font-family: var(--font-main);
    color: var(--color-primary);
    margin-bottom: 30px;
    line-height: 1.6;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.hero-subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--color-secondary);
    letter-spacing: 0.05em;
}

.hero-image {
    flex: 1;
    position: relative;
}

.hero-image img {
    border-radius: 0;
    box-shadow: var(--shadow);
    filter: grayscale(20%);
    transition: all 0.5s ease;
}

.hero-image:hover img {
    filter: grayscale(0%);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

/* Sections General */
.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-family: var(--font-main);
    font-weight: 400;
    color: var(--color-primary);
    margin: 0 auto 60px;
    position: relative;
    display: table;
    letter-spacing: 0.15em;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 1px;
    background-color: var(--color-primary);
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

.section-desc {
    text-align: center;
    margin-bottom: 50px;
    font-weight: 400;
    color: var(--color-secondary);
    letter-spacing: 0.05em;
}

/* News Section */
.news-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.news-item {
    background-color: transparent;
    padding: 25px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    position: relative;
    display: flex;
    align-items: center;
    gap: 40px;
    transition: all 0.3s;
}

.news-item:hover {
    padding-left: 10px;
}

.news-date {
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--color-secondary);
    min-width: 100px;
    letter-spacing: 0.05em;
}

.news-content p {
    color: var(--color-text);
}

/* Service Section */
.service-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.service-item {
    width: 100%;
    box-shadow: var(--shadow);
    transition: all 0.4s ease;
}

.service-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.service-item img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 2px;
}

/* Company Section */
.company-section {
    background-color: transparent;
    border-radius: 0;
}

.company-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.company-message {
    font-size: 1.3rem;
    font-family: var(--font-main);
    font-weight: 400;
    margin-bottom: 50px;
    color: var(--color-text);
    line-height: 2;
    letter-spacing: 0.05em;
}

.company-info {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 20px;
    text-align: left;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 50px;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.company-info dt {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

.company-info dd {
    color: var(--color-text);
    line-height: 1.8;
}

/* Contact Section */
.contact-section {
    text-align: center;
    padding-bottom: 100px;
}

.contact-desc {
    color: var(--color-secondary);
    margin-bottom: 40px;
}

.contact-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.btn-line {
    background-color: transparent;
    color: var(--color-primary);
    padding: 15px 50px;
    border: 1px solid var(--color-primary);
    border-radius: 0;
    font-weight: 400;
    font-size: 1rem;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
}

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

.btn-contact {
    background-color: var(--color-primary);
    color: white;
    padding: 15px 50px;
    border: 1px solid var(--color-primary);
    border-radius: 0;
    font-weight: 400;
    font-size: 1rem;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
}

.btn-contact:hover {
    background-color: transparent;
    color: var(--color-primary);
}

/* Footer */
.site-footer {
    background-color: var(--color-primary);
    color: white;
    text-align: center;
    padding: 30px;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 60px 0;
        min-height: auto;
    }

    .hero-container {
        flex-direction: column-reverse;
        text-align: center;
        gap: 40px;
    }

    .hero-title {
        font-size: 1.8rem;
        white-space: normal;
        word-wrap: break-word;
        word-break: break-word;
        /* Allow breaking inside words if needed to prevent overflow */
        line-height: 1.4;
    }

    .header-container {
        /* Keep row layout for logo and burger button */
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .mobile-menu-btn {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        height: 100dvh;
        /* Use dynamic viewport height for mobile browsers */
        padding-top: env(safe-area-inset-top);
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        display: flex;
        justify-content: center;
        align-items: center;
        transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        opacity: 0;
        visibility: hidden;
    }

    .main-nav.active {
        right: 0;
        opacity: 1;
        visibility: visible;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 30px;
        /* Reduced gap slightly */
        font-size: 1.2rem;
        width: 100%;
    }



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

    .btn-line,
    .btn-contact {
        width: 100%;
        max-width: 320px;
        padding: 15px 20px;
    }

    .company-info {
        grid-template-columns: 1fr;
        padding: 30px;
    }

    .section {
        padding: 60px 0;
    }
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('assets/bg_yokohama.png');
    background-size: cover;
    background-position: center;
    opacity: 0.3;
    z-index: -100;
    pointer-events: none;
}

.btn-line {
    display: none !important;
}

/* Contact Form Page */
.page-header {
    padding-top: 150px;
    padding-bottom: 50px;
    text-align: center;
}

.contact-form {
    max-width: 800px;
    margin: 0 auto;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 60px;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 30px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.required {
    background-color: #cc0000;
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    margin-left: 10px;
    vertical-align: middle;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    background-color: #fff;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-submit {
    text-align: center;
    margin-top: 50px;
}

.form-submit .btn-contact {
    min-width: 300px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .contact-form {
        padding: 30px;
    }
}

/* Opening Animation */
.opening-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.8s ease-out, visibility 0.8s ease-out;
}

.opening-animation.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.opening-logo {
    width: 200px;
    /* Adjust based on logo size */
    opacity: 0;
    animation: zoomInLogo 2.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

@keyframes zoomInLogo {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }

    20% {
        opacity: 1;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}