:root {
    --c-bg: #f8f8f6;
    /* Off White */
    --c-bg-sub: #ffffff;
    --c-text: #333333;
    --c-text-light: #666666;
    --c-accent: #000000;
    --c-accent-hover: #444444;
    --c-link: #111;
    --font-main: 'Inter', sans-serif;
    --font-jp: 'Noto Sans JP', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--c-bg);
    color: var(--c-text);
    font-family: var(--font-jp);
    line-height: 1.8;
    overflow-x: hidden;
    letter-spacing: 0.05em;
}

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

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

li {
    list-style: none;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.center {
    text-align: center;
}

.section {
    padding: 120px 0;
}

.section-title {
    font-family: var(--font-main);
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 30px;
    line-height: 1.2;
    letter-spacing: 0.1em;
}

.section-title-sm {
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.2em;
    color: var(--c-text-light);
}

.section-desc {
    margin-bottom: 60px;
    font-size: 1.1rem;
    color: var(--c-text-light);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: rgba(248, 248, 246, 0.8);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-main);
    font-weight: 900;
    font-size: 24px;
    letter-spacing: 2px;
}

.nav-desktop {
    display: flex;
    gap: 40px;
}

.nav-desktop a {
    font-family: var(--font-main);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
}

.nav-desktop a:hover {
    color: var(--c-text-light);
}

.btn-nav {
    display: block;
    background: var(--c-accent);
    color: #fff;
    padding: 10px 30px;
    border-radius: 4px;
    font-weight: 600;
    font-family: var(--font-main);
    font-size: 13px;
    letter-spacing: 1px;
}

/* Hero */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    /* Center vertically */
    align-items: center;
    justify-content: center;
    background: #fff;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.9;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    mix-blend-mode: normal;
    /* High key image, use black text */
    /* If image is dark, invert colors */
}

/* For this user image (White/Beige), we need Dark Text or careful placement */
/* We will assume text is dark on light image */
.hero-content {
    color: #000;
}

.hero-caption {
    font-family: var(--font-main);
    font-size: 14px;
    letter-spacing: 0.3em;
    margin-bottom: 20px;
}

.hero-title {
    font-family: var(--font-main);
    font-size: clamp(4rem, 10vw, 8rem);
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -0.02em;
    margin-bottom: 40px;
}

.btn-primary {
    display: inline-block;
    background: #000;
    color: #fff;
    padding: 18px 48px;
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 2px;
}

.btn-primary:hover {
    background: #333;
}

/* Message */
.message {
    background: #fff;
    text-align: center;
}

.message-heading {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 40px;
    line-height: 1.5;
}

.message-text {
    font-size: 1.05rem;
    margin-bottom: 60px;
    color: var(--c-text-light);
}

.message-sign {
    font-family: var(--font-main);
    font-weight: 600;
}

/* Concept */
.concept {
    background: var(--c-bg);
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.concept-lead {
    font-family: var(--font-main);
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 20px;
}

.concept-desc {
    margin-bottom: 40px;
    color: var(--c-text-light);
}

.concept-list li {
    display: flex;
    align-items: center;
    border-top: 1px solid #ddd;
    padding: 20px 0;
}

.concept-list li:last-child {
    border-bottom: 1px solid #ddd;
}

.concept-list .num {
    font-family: var(--font-main);
    font-size: 1.2rem;
    font-weight: 600;
    margin-right: 30px;
}

.concept-list .txt {
    font-family: var(--font-main);
    font-size: 1.5rem;
    font-weight: 700;
}

/* System */
.system {
    background: #fff;
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.system-card {
    background: var(--c-bg);
    padding: 40px 30px;
    text-align: center;
}

.system-card h3 {
    font-family: var(--font-main);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.system-card p {
    font-size: 0.95rem;
    color: var(--c-text-light);
}

.btn-secondary {
    display: inline-block;
    border: 1px solid #000;
    color: #000;
    padding: 15px 40px;
    font-family: var(--font-main);
    font-size: 14px;
    margin-top: 60px;
}

.btn-secondary:hover {
    background: #000;
    color: #fff;
}

/* Voice */
.voice {
    background: var(--c-bg);
    padding-bottom: 200px;
}

.voice-main {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.voice-img img {
    width: 100%;
    border-radius: 4px;
    /* Slight soft edge */
}

.voice-text {
    padding-top: 40px;
}

.voice-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    line-height: 1.4;
}

.voice-name {
    font-family: var(--font-main);
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--c-text-light);
}

.voice-body {
    line-height: 2;
    color: var(--c-text);
}

/* Flow & FAQ */
.flow {
    background: #fff;
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.flow-item {
    text-align: center;
    position: relative;
}

.flow-item::after {
    content: '';
    position: absolute;
    top: 20%;
    right: -10px;
    width: 20px;
    height: 1px;
    background: #ddd;
    transform: rotate(-45deg);
    /* Arrowish */
    display: none;
    /* Simplify */
}

.step-label {
    font-family: var(--font-main);
    font-size: 0.8rem;
    color: var(--c-text-light);
    display: block;
    margin-bottom: 10px;
}

.flow-item h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.flow-item p {
    font-size: 0.9rem;
    color: var(--c-text-light);
}


.faq {
    background: #fafafa;
}

.faq-list {
    border-top: 1px solid #ddd;
}

.faq-item {
    border-bottom: 1px solid #ddd;
    padding: 30px 0;
}

.faq-item dt {
    font-weight: 700;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.faq-item dd {
    font-size: 1rem;
    color: var(--c-text-light);
    padding-left: 20px;
}


/* Recruit */
.recruit {
    background: #fff;
}

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

.recruit-table th,
.recruit-table td {
    padding: 30px;
    border-bottom: 1px solid #eee;
    text-align: left;
    vertical-align: top;
}

.recruit-table th {
    width: 30%;
    background: #fafafa;
    font-weight: 700;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: #0a0a0a;
    color: #fff;
}

.footer-cta {
    background: #fff;
    color: #000;
    text-align: center;
    padding: 120px 0;
}

.footer-cta h2 {
    font-family: var(--font-main);
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 20px;
}

.footer-cta p {
    margin-bottom: 50px;
    color: var(--c-text-light);
}

.btn-entry {
    display: inline-block;
    background: #000;
    color: #fff;
    padding: 20px 80px;
    font-family: var(--font-main);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.btn-entry:hover {
    background: #333;
}

.cta-note {
    font-size: 0.8rem;
    color: #999;
}

.footer-bottom {
    padding: 60px 0;
    border-top: 1px solid #222;
}

.footer-logo {
    font-family: var(--font-main);
    font-weight: 900;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-links a {
    font-size: 0.9rem;
    color: #888;
}

.footer-links a:hover {
    color: #fff;
}

.copyright {
    font-size: 0.8rem;
    color: #444;
}

/* Responsive */
@media (max-width: 768px) {
    .header-inner {
        padding: 0 20px;
    }

    .nav-desktop {
        display: none;
    }

    .hero-title {
        font-size: 3.5rem;
    }

    .split-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .system-grid,
    .voice-main,
    .flow-steps {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .recruit-table th,
    .recruit-table td {
        display: block;
        width: 100%;
        border: none;
    }

    .recruit-table th {
        background: transparent;
        padding-bottom: 10px;
        color: #999;
    }

    .recruit-table td {
        padding-top: 0;
        padding-bottom: 40px;
        border-bottom: 1px solid #eee;
    }
}