:root {
    color-scheme: light dark;
    --bg: #eaeaea;
    --surface: #e4e4e4;
    --surface-soft: rgba(255, 255, 255, 0.55);
    --text: #333;
    --muted: #555;
    --quiet: #777;
    --line: #cfcfcf;
    --badge-bg: #ddd;
    --badge-text: #333;
    --accent: #111;
    --nav-bg: rgba(234, 234, 234, 0.86);
    --shadow-dark: #c8c8c8;
    --shadow-light: #fff;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 112px 20px 80px;
    display: flex;
    justify-content: center;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Kaku Gothic ProN", Arial, sans-serif;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    transition: background-color 800ms ease, color 800ms ease;
}

body.dark {
    --bg: #111;
    --surface: #171717;
    --surface-soft: rgba(255, 255, 255, 0.045);
    --text: #f5f5f7;
    --muted: #ccc;
    --quiet: #9fa9b4;
    --line: #333;
    --badge-bg: #f5f5f7;
    --badge-text: #111;
    --accent: #fff;
    --nav-bg: rgba(17, 17, 17, 0.86);
    --shadow-dark: #070707;
    --shadow-light: #1b1b1b;
}

a,
button {
    -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

.site-nav {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    border-bottom: 1px solid var(--line);
    background: var(--nav-bg);
    backdrop-filter: blur(18px) saturate(130%);
    -webkit-backdrop-filter: blur(18px) saturate(130%);
}

.site-nav__inner {
    width: min(100% - 32px, 500px);
    min-height: 72px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 18px;
}

.site-mark {
    color: var(--text);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-decoration: none;
}

.site-links {
    display: flex;
    gap: 4px;
}

.nav-link,
.theme-toggle {
    min-height: 36px;
    border-radius: 8px;
    color: var(--muted);
    font-family: inherit;
    font-size: 12px;
    font-weight: 650;
    letter-spacing: 0.08em;
    text-decoration: none;
}

.nav-link {
    padding: 6px 11px;
    display: inline-flex;
    align-items: center;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
    background: var(--surface-soft);
    color: var(--accent);
}

.nav-link[aria-current="page"] {
    box-shadow: inset 0 0 0 1px var(--line);
}

.theme-toggle {
    min-width: 58px;
    padding: 6px 10px;
    border: 1px solid var(--line);
    background: var(--surface);
    cursor: pointer;
}

.theme-toggle:hover {
    color: var(--accent);
}

.container {
    width: 100%;
    max-width: 500px;
}

.profile-header,
.page-header {
    margin-bottom: 50px;
}

h1 {
    margin: 0;
    color: var(--text);
    font-size: 22px;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.kanji {
    margin-left: 8px;
    color: var(--quiet);
    font-size: 0.85em;
    font-weight: normal;
    letter-spacing: 0.1em;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.role-badge,
.status-badge {
    display: inline-block;
    border-radius: 20px;
    background: var(--badge-bg);
    color: var(--badge-text);
    font-size: 12px;
    font-weight: 650;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.role-badge {
    margin: 12px 0 4px;
    padding: 4px 12px;
    animation: slideIn 1.5s ease-out;
}

.keywords {
    margin: 18px 0 8px;
    color: var(--muted);
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 12.5px;
    letter-spacing: 0.05em;
}

.keywords .slash {
    margin: 0 6px;
    color: var(--line);
}

.sub-text,
.eyebrow {
    color: var(--quiet);
    font-size: 13px;
    letter-spacing: 0.05em;
}

.sub-text {
    margin-top: 12px;
}

.eyebrow {
    margin: 0 0 8px;
    font-family: "SF Mono", Menlo, Consolas, monospace;
    text-transform: uppercase;
}

.page-lead {
    margin-top: 18px;
    color: var(--muted);
}

section {
    margin-bottom: 40px;
}

h2 {
    margin: 0 0 20px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--line);
    color: var(--text);
    font-size: 13px;
    font-weight: 650;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

p {
    margin: 0 0 15px;
    color: var(--muted);
    font-size: 14.5px;
}

.project-item {
    margin-bottom: 25px;
}

.label {
    display: block;
    margin-bottom: 6px;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.project-desc {
    margin: 0;
}

.sns-box {
    display: flex;
    justify-content: flex-start;
    gap: 2rem;
    margin-top: 40px;
}

.btn-sns {
    width: 3.5rem;
    height: 3.5rem;
    display: grid;
    place-content: center;
    border-radius: 0.5rem;
    background: var(--bg);
    text-decoration: none;
    transition: box-shadow 500ms ease;
}

.btn-sns svg {
    width: 1.5rem;
    height: 1.5rem;
    fill: var(--quiet);
    transition: fill 500ms ease;
}

.btn-sns:hover {
    box-shadow: 6px 6px 12px var(--shadow-dark), -6px -6px 12px var(--shadow-light);
}

.btn-sns:hover svg {
    fill: var(--accent);
}

.work-card {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface-soft);
}

.work-card__meta {
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: var(--quiet);
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 11px;
}

.status-badge {
    padding: 3px 10px;
}

.work-card h3 {
    margin: 0 0 14px;
    color: var(--text);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.feature-list {
    margin: 20px 0;
    padding-left: 20px;
    color: var(--muted);
    font-size: 13.5px;
}

.feature-list li + li {
    margin-top: 6px;
}

.notice-box {
    margin: 22px 0;
    padding: 14px 16px;
    border-left: 3px solid var(--quiet);
    background: var(--surface);
    color: var(--muted);
    font-size: 13px;
}

.tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-list span {
    padding: 4px 9px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--quiet);
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 10.5px;
}

.work-actions {
    margin-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.primary-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 42px;
    padding: 8px 14px;
    border-radius: 9px;
    background: var(--accent);
    color: var(--bg);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-decoration: none;
}

.private-note {
    color: var(--quiet);
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 10.5px;
}

footer {
    margin-top: 80px;
    color: var(--quiet);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

@media (max-width: 540px) {
    body {
        padding-top: 100px;
    }

    .site-nav__inner {
        width: min(100% - 24px, 500px);
        min-height: 64px;
        gap: 8px;
    }

    .site-mark {
        font-size: 10px;
    }

    .nav-link {
        padding-inline: 8px;
    }

    .theme-toggle {
        min-width: 52px;
        padding-inline: 7px;
    }

    .kanji {
        display: block;
        margin: 8px 0 0;
    }

    .work-card {
        padding: 20px;
    }

    .work-actions {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}