/* ==========================================================================
   Base Styles & Variables
   ========================================================================== */
:root {
    --color-text: #000000;
    --color-bg: #FFFFFF;
    --color-border: rgba(0, 0, 0, 0.15);
    --color-surface: #FAFAFA;
    
    --font-sans: 'Noto Serif JP', serif;
    --font-en: 'Playfair Display', serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.2s ease;
}

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

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

/* Typography Utilities */
.en-text {
    font-family: var(--font-en);
}
.text-center {
    text-align: center;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}
.container.narrow {
    max-width: 800px;
}
.section {
    padding: var(--spacing-xl) 0;
}
.pb-large {
    padding-bottom: var(--spacing-xl);
}
.bg-light {
    /* To maintain #FFFFFF as primary, we use a very subtle border/structure instead of heavy backgrounds */
    border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-md) 5%;
    z-index: 100;
    transition: background-color var(--transition-normal), padding var(--transition-normal);
}
.header.is-scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-sm) 5%;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 32px;
    width: auto;
    object-fit: contain;
}

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

.nav-link {
    font-family: var(--font-en);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    padding-bottom: 4px;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 1px;
    background-color: var(--color-text);
    transition: width var(--transition-normal);
}
.nav-link:hover::after {
    width: 100%;
}

/* ==========================================================================
   Section A: Hero (FV)
   ========================================================================== */
.hero {
    height: 100vh;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start; /* Left aligned */
    position: relative;
    text-align: left;
    padding: 0 5%;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 400;
    line-height: 1.4;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-md);
    opacity: 0;
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards 0.2s;
}

.hero-subtitle {
    font-family: var(--font-en);
    font-size: clamp(0.85rem, 1.5vw, 1.1rem);
    font-weight: 400;
    letter-spacing: 0.1em;
    color: rgba(0, 0, 0, 0.6);
    opacity: 0;
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards 0.6s;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0;
    animation: fadeIn 1s ease forwards 1.5s;
}

.scroll-indicator span {
    font-family: var(--font-en);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: rgba(0,0,0,0.5);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background-color: rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-text);
    animation: scrollLine 2s cubic-bezier(0.16, 1, 0.3, 1) infinite;
}

@keyframes scrollLine {
    0% { transform: translateY(-100%); }
    50% { transform: translateY(0); }
    100% { transform: translateY(100%); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* ==========================================================================
   Section B: Mission
   ========================================================================== */
.mission {
    padding-top: var(--spacing-lg);
}

.mission-statement {
    max-width: 800px;
    margin: 0 auto;
}

.mission-statement p {
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 300;
    line-height: 2;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-lg);
}

.mission-statement p.highlight {
    font-weight: 500;
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    margin-bottom: 0;
    margin-top: var(--spacing-lg);
}

/* ==========================================================================
   Section C: About & Origin
   ========================================================================== */
.section-title {
    font-family: var(--font-en);
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 1px;
    background-color: var(--color-text);
}

.section-title.text-center {
    display: block;
    text-align: center;
}

.section-title.text-center::after {
    left: 50%;
    transform: translateX(-50%);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.origin-content p {
    font-size: 1rem;
    font-weight: 300;
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
}

.company-table {
    width: 100%;
    border-collapse: collapse;
}

.company-table th,
.company-table td {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    vertical-align: top;
    font-size: 0.95rem;
    font-weight: 300;
    line-height: 1.8;
}

.company-table tr:first-child th,
.company-table tr:first-child td {
    border-top: 1px solid var(--color-border);
}

.company-table th {
    font-weight: 500;
    width: 30%;
    white-space: nowrap;
}

@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* ==========================================================================
   Section D: Contact
   ========================================================================== */
.contact-header {
    margin-bottom: var(--spacing-lg);
}

.call-to-action {
    font-size: 1rem;
    font-weight: 300;
    margin-top: var(--spacing-md);
    color: rgba(0,0,0,0.7);
}

.contact-form {
    background: #fff;
    padding: var(--spacing-md);
}

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

.form-row {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-row .form-group {
    margin-bottom: 0;
    flex: 1;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.05em;
}

.required-mark {
    color: #e53935; /* Subtle red for premium feel */
    margin-left: 4px;
    font-weight: bold;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    background-color: transparent;
    color: var(--color-text);
    border-radius: 0;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    appearance: none;
}

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

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-text);
    box-shadow: 0 0 0 1px var(--color-text);
}

input::placeholder,
textarea::placeholder {
    color: rgba(0,0,0,0.3);
}

/* Custom Select Wrapper */
.select-wrapper {
    position: relative;
}
.select-wrapper::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 16px;
    transform: translateY(-50%);
    width: 10px;
    height: 6px;
    background-color: var(--color-text);
    clip-path: polygon(100% 0%, 0 0%, 50% 100%);
    pointer-events: none;
}


.form-submit {
    margin-top: var(--spacing-lg);
    text-align: center;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-text);
    color: var(--color-bg);
    border: none;
    padding: 16px 40px;
    font-family: var(--font-en);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    background-color: #222;
}

.btn-arrow {
    display: inline-block;
    width: 20px;
    height: 1px;
    background-color: currentColor;
    margin-left: 15px;
    position: relative;
    transition: width var(--transition-fast);
}

.btn-arrow::after {
    content: '';
    position: absolute;
    right: 0;
    top: -4px;
    width: 8px;
    height: 8px;
    border-top: 1px solid currentColor;
    border-right: 1px solid currentColor;
    transform: rotate(45deg);
}

.submit-btn:hover .btn-arrow {
    width: 30px;
}


@media (max-width: 600px) {
    .form-row {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
}

.copyright {
    font-family: var(--font-en);
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    color: rgba(0,0,0,0.6);
}

/* ==========================================================================
   Animations & Reveals
   ========================================================================== */
.js-scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.js-scroll-reveal.is-revealed {
    opacity: 1;
    transform: translateY(0);
}