:root {
    /* Colors */
    --color-bg: #FFFFFF;
    --color-text: #333333;
    --color-accent-navy: #1B263B;
    --color-accent-silver: #C0C0C0;
    --color-light-bg: #F9F9F9;
    --color-dark-bg: #111111;

    /* Typography */
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Noto Sans JP', sans-serif;

    /* Spacing */
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 2.0;
    letter-spacing: 0.05em;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

h1,
h2,
h3 {
    font-family: var(--font-serif);
    font-weight: 400;
}

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

a:hover {
    opacity: 0.7;
}

/* Utilities */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
}

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

.text-white {
    color: #fff;
}

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

.bg-dark {
    background-color: var(--color-accent-navy);
}

/* Branding */
.brand-logo {
    position: fixed;
    top: 40px;
    left: 50px;
    z-index: 1000;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.5em;
    color: var(--color-text);
    text-decoration: none;
    opacity: 0;
    /* For animation */
    --target-opacity: 1;
}

.brand-logo:hover {
    opacity: 0.7;
}

/* Vertical Text Utility */
.vertical-text {
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: 0.5em;
    /* Increased from 0.2em for elegance */
    line-height: 3.0;
    /* Increased line height */
    white-space: nowrap;
    /* Prevent automatic text wrapping */
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
    /* Establish stacking context above body */
}

.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    /* Place behind content but in front of body background (if parent context is handled) */
}

.video-background iframe {
    width: 100vw;
    height: 56.25vw;
    /* 16:9 Aspect Ratio */
    min-height: 100vh;
    min-width: 177.77vh;
    /* 16:9 Aspect Ratio */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.7);
    /* Light overlay for visibility */
    z-index: 1;
    /* Above video(0) */
}

.hero-content {
    position: relative;
    z-index: 2;
    /* Content topmost */
    padding: var(--spacing-lg);
}

.hero-content h1 {
    font-size: 2.5rem;
    color: var(--color-text);
    border-right: 1px solid var(--color-text);
    /* Decorative line */
    padding-right: var(--spacing-sm);
    height: auto;
    /* Increased from 60vh to prevent wrapping */
    min-height: 60vh;
    /* Control height of vertical text block */
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-family: var(--font-serif);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    animation: bounce 2s infinite;
}

.scroll-indicator .line {
    width: 1px;
    height: 50px;
    background-color: var(--color-text);
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Mission Section */
.container-vertical {
    display: flex;
    flex-direction: row-reverse;
    /* Title on right for vertical text */
    justify-content: center;
    gap: var(--spacing-lg);
    align-items: flex-start;
    height: auto;
    min-height: 60vh;
}

.mission-text {
    max-width: 500px;
    padding-top: var(--spacing-lg);
}

.mission-catch {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.section-title {
    font-size: 2rem;
    letter-spacing: 0.1em;
    color: var(--color-accent-navy);
}

.center-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.service-card {
    background: #fff;
    padding: var(--spacing-md);
    border: 1px solid #eee;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    border-color: var(--color-accent-silver);
}

.service-number {
    font-family: var(--font-serif);
    font-size: 3rem;
    color: var(--color-accent-silver);
    opacity: 0.3;
    position: absolute;
    top: -10px;
    right: 10px;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--color-accent-navy);
}

.service-card .jp-title {
    font-weight: bold;
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.service-desc {
    font-size: 0.9rem;
    color: #666;
}

/* Works Section */
.works-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.work-item {
    border-bottom: 1px solid #eee;
    padding: var(--spacing-md) 0;
}

.work-content h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-navy);
}

/* Contact Section */
.contact-section {
    text-align: center;
    background-color: #111;
    /* Explicit dark bg */
    color: #fff;
}

.about-content {
    margin-bottom: var(--spacing-xl);
    text-align: left;
    /* Align text left for readability */
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.about-content h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
    text-align: center;
    /* Center Name */
}

.representative-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    opacity: 0.6;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    /* Center Title */
    letter-spacing: 0.2em;
}

.profile-story {
    font-size: 0.95rem;
    line-height: 2.2;
    color: rgba(255, 255, 255, 0.9);
}

.profile-story p {
    margin-bottom: var(--spacing-md);
}

.story-lead {
    font-size: 1.2rem;
    font-family: var(--font-serif);
    margin-bottom: var(--spacing-lg) !important;
    text-align: center;
    line-height: 2.0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md) 0;
}

.simple-form {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    background: transparent;
    color: #fff;
    font-family: var(--font-sans);
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-bottom-color: #fff;
}

.submit-btn {
    background: #fff;
    color: var(--color-accent-navy);
    border: none;
    padding: 12px 40px;
    font-family: var(--font-serif);
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: background 0.3s, color 0.3s;
    margin-top: var(--spacing-sm);
}

.submit-btn:hover {
    background: var(--color-accent-silver);
    color: #fff;
}

.footer {
    margin-top: var(--spacing-xl);
    font-size: 0.8rem;
    opacity: 0.5;
}

/* Animations */
.fade-in {
    opacity: 0;
    transition: opacity 1s ease-out;
}

.fade-in.visible {
    opacity: 1;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    /* Slightly deeper start */
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    /* "Slow ease-out" for premium feel */
}

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

.fade-in-down {
    animation: fadeInDown 1.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 0.5s;
}

@keyframes fadeInDown {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }

    100% {
        opacity: var(--target-opacity);
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 5rem;
    }

    .brand-logo {
        top: 20px;
        left: 20px;
        font-size: 1.2rem;
        --target-opacity: 0.6;
        /* Mobile opacity */
    }

    .container-vertical {
        flex-direction: column;
        align-items: flex-start;
        /* Left align for cleaner mobile read */
        text-align: left;
        min-height: auto;
    }

    .vertical-text {
        writing-mode: horizontal-tb;
        height: auto;
        border-right: none;
        border-left: 3px solid var(--color-text);
        /* Switch to left border for horizontal */
        border-bottom: none;
        padding-left: var(--spacing-sm);
        padding-bottom: 0;
        margin-bottom: var(--spacing-md);
        line-height: 2.0;
        letter-spacing: 0.15em;
        /* Mobile specific adjustments */
    }

    .hero-content {
        padding: var(--spacing-md);
        width: 100%;
    }

    .hero-content h1 {
        height: auto;
        font-size: 1.8rem;
        border-right: none;
        padding-right: 0;
    }

    .video-background iframe {
        width: 300%;
        /* Force zoom to cover height on mobile */
        left: 50%;
        /* Center horizontally relative to container */
        transform: translate(-50%, -50%);
        /* Ensure true centering */
        opacity: 0.6;
        /* Slight dim on mobile to ensure text readability */
    }

    .service-card {
        padding: var(--spacing-sm);
    }
}

/* Premium Polish */
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.service-card {
    border: 1px solid transparent;
    /* Cleaner initial state */
    background: linear-gradient(145deg, #ffffff, #f0f0f0);
    box-shadow: 5px 5px 15px #d1d1d1, -5px -5px 15px #ffffff;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    border-color: var(--color-accent-silver);
}

.form-group input:focus,
.form-group textarea:focus {
    border-bottom: 1px solid #fff;
    background: rgba(255, 255, 255, 0.05);
}

/* Scroll Reveal specific adjustment */
.visible {
    transition-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
}