@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans+JP:wght@300;400;500&display=swap");

/* ─── Variables ─────────────────────────────────────────── */
:root {
    --bg: #0e0e0e;
    /*背景*/
    --surface: #161616;
    --border: #252525;
    /*線*/
    --muted: #ffffff;
    --subtle: #ffffff;
    --body: #ffffff;
    /*本文*/
    --heading: #ffffff;
    /*見出し*/
    --accent: #ffffff;
    /*一番上*/
    --tag: #2a2a2a;
}

/* ─── Reset & Base ──────────────────────────────────────── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg);
    color: var(--body);
    font-family: "IBM Plex Sans JP", sans-serif;
    font-weight: 300;
    line-height: 1.7;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

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

/* ─── Layout ────────────────────────────────────────────── */
.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}

/* ─── Top Bar ───────────────────────────────────────────── */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.site-title {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--heading);
    letter-spacing: 0.02em;
    transition: color 0.15s;
}

.site-title:hover {
    color: var(--accent);
}

.top-bar-right {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.75rem;
    color: var(--muted);
}

/* ─── Profile ───────────────────────────────────────────── */
.profile {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 32px;
}

.icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: block;
    flex-shrink: 0;
    border: 1px solid var(--border);
}

.profile-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.name {
    font-family: "IBM Plex Mono", monospace;
    font-size: 1rem;
    font-weight: 500;
    color: var(--heading);
}

.bio {
    max-width: 580px;
    font-size: 0.88rem;
    color: var(--subtle);
    margin: 32px 0;
    text-align: left;
}

/* ─── Nav ───────────────────────────────────────────────── */
nav {
    margin-bottom: 48px;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

nav ul li a {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.75rem;
    color: var(--subtle);
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 3px;
    display: inline-block;
    transition: color 0.15s, border-color 0.15s;
}

nav ul li a:hover {
    color: var(--heading);
    border-color: var(--muted);
}

/* ─── Section Header ────────────────────────────────────── */
.section-header {
    margin-bottom: 16px;
}

.section-header h2 {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

/* ─── Post List ─────────────────────────────────────────── */
.post-list ul {
    list-style: none;
}

.post-list li {
    display: grid;
    grid-template-columns: 64px 1fr auto;
    align-items: baseline;
    gap: 12px;
    padding: 13px 0;
    border-bottom: 1px solid var(--border);
    transition: background 0.1s;
}

.post-list li:first-child {
    border-top: 1px solid var(--border);
}

.post-meta {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.68rem;
    color: var(--muted);
    white-space: nowrap;
}

.post-title {
    font-size: 0.93rem;
    color: var(--body);
    transition: color 0.15s;
}

.post-title:hover {
    color: var(--accent);
}

.date {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.68rem;
    color: var(--muted);
    white-space: nowrap;
}

/* ─── Footer ────────────────────────────────────────────── */
footer {
    margin-top: 64px;
    padding-top: 16px;
    display: flex;
    justify-content: space-between;
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.7rem;
    color: var(--muted);
}

/* ─── Mobile ────────────────────────────────────────────── */
@media (max-width: 480px) {
    .container {
        padding: 32px 18px 60px;
    }

    .post-list li {
        grid-template-columns: 56px 1fr;
        grid-template-rows: auto auto;
    }

    .date {
        grid-column: 2;
        margin-top: -6px;
    }
}