:root {
    --asagi-50: #eefbfb;
    --asagi-100: #d9f4f5;
    --asagi-200: #b8e8eb;
    --asagi-300: #8bd5da;
    --asagi-400: #4fbcc5;
    --asagi-500: #00a3af;
    --asagi-600: #008c97;
    --asagi-700: #14727b;
    --asagi-800: #245e65;
    --asagi-900: #244c52;

    --ink: #253437;
    --muted: #66777b;
    --soft-muted: #8a9da1;
    --paper: #fffefd;
    --paper-soft: #f8fbfb;
    --line: rgba(0, 163, 175, 0.16);
    --shadow: 0 24px 70px rgba(17, 93, 101, 0.12);
    --shadow-soft: 0 14px 40px rgba(17, 93, 101, 0.08);
    --radius-xl: 32px;
    --radius-lg: 24px;
    --radius-md: 16px;
    --max-width: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Noto Sans JP", Meiryo, sans-serif;
    line-height: 1.75;
    background:
        radial-gradient(circle at 16% 12%, rgba(0, 163, 175, 0.13), transparent 34%),
        radial-gradient(circle at 84% 18%, rgba(139, 213, 218, 0.18), transparent 30%),
        linear-gradient(135deg, #fbfefe 0%, #eefbfb 48%, #f9fcfb 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(0, 163, 175, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 163, 175, 0.035) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.45), transparent 72%);
}

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

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

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1000;
    transform: translateY(-140%);
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--asagi-700);
    color: white;
    font-size: 0.9rem;
    transition: transform 0.2s ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.page-shell {
    position: relative;
    width: min(var(--max-width), calc(100% - 40px));
    margin: 0 auto;
    padding: 26px 0 40px;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 14px 16px;
    margin-bottom: 54px;
    border: 1px solid rgba(0, 163, 175, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(18px);
    box-shadow: 0 10px 34px rgba(17, 93, 101, 0.06);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    color: white;
    font-weight: 600;
    letter-spacing: 0.04em;
    background: linear-gradient(135deg, var(--asagi-500), var(--asagi-700));
    box-shadow: 0 10px 28px rgba(0, 163, 175, 0.22);
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.brand-name {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.08em;
}

.brand-sub {
    color: var(--soft-muted);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
    font-size: 0.86rem;
}

.site-nav a {
    padding: 8px 12px;
    border-radius: 999px;
    transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--asagi-800);
    background: var(--asagi-50);
    outline: none;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
    align-items: center;
    gap: 48px;
    padding: 38px 0 70px;
}

.eyebrow,
.section-kicker {
    margin: 0 0 14px;
    color: var(--asagi-700);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.hero-title {
    margin: 0;
    font-weight: 500;
    line-height: 1.28;
    letter-spacing: 0.02em;
}

.hero-title .line {
    display: block;
}

.hero-title .line-small {
    margin-bottom: 4px;
    color: var(--muted);
    font-size: clamp(1.05rem, 1.5vw, 1.34rem);
    font-weight: 400;
}

.hero-title .line-main {
    color: var(--ink);
    font-size: clamp(1.72rem, 4.4vw, 3.12rem);
}

.hero-lead {
    min-height: 1.8em;
    margin: 26px 0 0;
    color: var(--asagi-800);
    font-size: clamp(1.04rem, 2vw, 1.28rem);
    font-weight: 500;
    letter-spacing: 0.03em;
}

.hero-description {
    margin: 18px 0 0;
    max-width: 620px;
    color: var(--muted);
    font-size: 1rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 11px 18px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
    outline: none;
}

.button-primary {
    color: white;
    background: linear-gradient(135deg, var(--asagi-500), var(--asagi-700));
    box-shadow: 0 14px 32px rgba(0, 163, 175, 0.22);
}

.button-primary:hover,
.button-primary:focus-visible {
    box-shadow: 0 16px 42px rgba(0, 163, 175, 0.28);
}

.button-soft {
    color: var(--asagi-800);
    border-color: rgba(0, 163, 175, 0.16);
    background: rgba(255, 255, 255, 0.68);
}

.button-soft:hover,
.button-soft:focus-visible {
    background: var(--asagi-50);
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.visual-card {
    position: relative;
    width: min(100%, 430px);
    aspect-ratio: 0.9 / 1;
    padding: 18px;
    border: 1px solid rgba(0, 163, 175, 0.18);
    border-radius: var(--radius-xl);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(238, 251, 251, 0.82)),
        radial-gradient(circle at 50% 22%, rgba(0, 163, 175, 0.14), transparent 48%);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.visual-card::before,
.visual-card::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    filter: blur(2px);
}

.visual-card::before {
    width: 160px;
    height: 160px;
    right: -46px;
    top: -34px;
    background: rgba(0, 163, 175, 0.12);
}

.visual-card::after {
    width: 120px;
    height: 120px;
    left: -36px;
    bottom: -28px;
    background: rgba(139, 213, 218, 0.22);
}

.visual-placeholder {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    height: 100%;
    border: 1px dashed rgba(0, 163, 175, 0.24);
    border-radius: 24px;
    color: var(--soft-muted);
    text-align: center;
    background: rgba(255, 255, 255, 0.46);
}

.placeholder-orb {
    position: absolute;
    width: 128px;
    height: 128px;
    border-radius: 50%;
    background:
        radial-gradient(circle at 35% 30%, rgba(255, 255, 255, 0.95), transparent 24%),
        linear-gradient(135deg, var(--asagi-200), var(--asagi-500));
    box-shadow: 0 22px 44px rgba(0, 163, 175, 0.22);
    opacity: 0.85;
}

.placeholder-text {
    position: relative;
    z-index: 1;
    margin-top: 180px;
    font-size: 0.86rem;
    letter-spacing: 0.12em;
}

.hero-image {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 24px;
}

.message,
.concept,
.status {
    padding: 54px 16px;
    max-width: 1180px;
    margin: 0 auto; 
}

.section-heading {
    max-width: 720px;
    margin-bottom: 24px;
}

.section-heading h2,
.status h2 {
    margin: 0;
    color: var(--ink);
    font-size: clamp(1.35rem, 2.6vw, 2rem);
    font-weight: 500;
    line-height: 1.45;
    letter-spacing: 0.03em;
}

.message-card,
.status-inner {
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(16px);
}

.message-card {
    padding: clamp(24px, 4vw, 42px);
    color: var(--muted);
}

.message-card p {
    margin: 0;
}

.message-card p + p {
    margin-top: 18px;
}

.message-signature {
    color: var(--asagi-800);
    font-size: 0.94rem;
    letter-spacing: 0.08em;
    text-align: right;
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.concept-card {
    min-height: 218px;
    padding: 24px;
    border: 1px solid rgba(0, 163, 175, 0.14);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.66);
    box-shadow: 0 12px 34px rgba(17, 93, 101, 0.06);
    transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.concept-card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 163, 175, 0.25);
    box-shadow: 0 18px 46px rgba(17, 93, 101, 0.1);
}

.card-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    height: 28px;
    padding: 0 10px;
    border-radius: 999px;
    color: var(--asagi-700);
    background: var(--asagi-50);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.concept-card h3 {
    margin: 20px 0 10px;
    font-size: 1.08rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.concept-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.status-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
    padding: clamp(24px, 4vw, 40px);
}

.status-inner p {
    margin: 14px 0 0;
    color: var(--muted);
}

.status-badge {
    display: grid;
    place-items: center;
    width: 122px;
    height: 122px;
    border-radius: 50%;
    color: var(--asagi-800);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.84), rgba(238, 251, 251, 0.76)),
        radial-gradient(circle, rgba(0, 163, 175, 0.12), transparent 64%);
    border: 1px solid rgba(0, 163, 175, 0.18);
    box-shadow: inset 0 0 0 8px rgba(255, 255, 255, 0.46);
    font-size: 0.84rem;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.site-footer {
    display: grid;
    gap: 10px;
    padding: 42px 0 10px;
    color: var(--soft-muted);
    font-size: 0.82rem;
    text-align: center;
}

.site-footer p {
    margin: 0;
}

.footer-note {
    max-width: 720px;
    margin-inline: auto !important;
}

.section-fade {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.section-fade.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 900px) {
    .page-shell {
        width: min(100% - 28px, var(--max-width));
        padding-top: 16px;
    }

    .site-header {
        margin-bottom: 28px;
    }

    .hero {
        grid-template-columns: 1fr;
        gap: 36px;
        padding-top: 26px;
    }

    .hero-visual {
        justify-content: center;
        width: 100%;
    }

    .visual-card {
        max-width: 380px;
    }

    .concept-grid {
        grid-template-columns: 1fr;
    }

    .status-inner {
        grid-template-columns: 1fr;
    }

    .status-badge {
        width: auto;
        height: auto;
        justify-self: start;
        padding: 10px 16px;
        border-radius: 999px;
        box-shadow: none;
    }
}

@media (max-width: 640px) {
    body {
        line-height: 1.72;
    }

    .site-header {
        align-items: flex-start;
        border-radius: 24px;
        flex-direction: column;
        gap: 14px;
    }

    .site-nav {
        width: 100%;
        justify-content: space-between;
    }

    .site-nav a {
        padding-inline: 8px;
        font-size: 0.82rem;
    }

    .hero {
        padding-bottom: 42px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .button {
        width: 100%;
    }

    .visual-card {
        width: 100%;
        aspect-ratio: 1 / 1.08;
        border-radius: 26px;
    }

    .message,
    .concept,
    .status {
        padding: 38px 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    .section-fade {
        opacity: 1;
        transform: none;
    }
}