@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=M+PLUS+Rounded+1c:wght@400;500;700;800&display=swap');

:root {
    --brand:        #7c6ce0;
    --brand-soft:   #a388ee;
    --brand-dark:   #5a4bbf;
    --bg:           #f9f7ff;
    --bg-grad:      #f0eaff;
    --text:         #2f2854;
    --text-mute:    #6e63a6;
    --text-soft:    #9d93c8;
    --border:       #e8e0f8;
    --status-resolved: #5a4bbf;
    --status-wip:      #94701a;
    --status-insight:  #7c6ce0;
}

*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
    font-family: 'M PLUS Rounded 1c', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.mono { font-family: 'JetBrains Mono', monospace; }

/* ====== Header ====== */
.tb-header {
    background: #fff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}
.tb-header-inner {
    max-width: 880px;
    margin: 0 auto;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.tb-brand {
    color: var(--brand);
    font-weight: 800;
    font-size: 20px;
    text-decoration: none;
    letter-spacing: -0.01em;
}
.tb-nav {
    display: flex;
    gap: 18px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-mute);
}
.tb-nav a {
    color: inherit;
    text-decoration: none;
    transition: color .15s;
}
.tb-nav a:hover { color: var(--brand); }
.tb-nav a[aria-current="page"] { color: var(--brand); }

/* ====== Container ====== */
.tb-shell {
    max-width: 880px;
    margin: 0 auto;
    padding: 28px 16px 56px;
}

/* ====== Breadcrumbs ====== */
.logs-breadcrumb {
    font-size: 12px;
    color: var(--text-soft);
    margin-bottom: 18px;
}
.logs-breadcrumb ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
}
.logs-breadcrumb a {
    color: var(--text-mute);
    text-decoration: none;
    font-weight: 600;
}
.logs-breadcrumb a:hover { color: var(--brand); }
.logs-breadcrumb__sep {
    color: var(--text-soft);
    margin: 0 8px;
}
.logs-breadcrumb [aria-current="page"] {
    color: var(--text);
    font-weight: 700;
}

/* ====== Hero（一覧トップ用） ====== */
.logs-hero {
    background: linear-gradient(180deg, var(--bg-grad) 0%, var(--bg) 100%);
    margin: -28px -16px 24px;
    padding: 40px 24px 32px;
    border-radius: 0 0 28px 28px;
}
.logs-hero__eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: .18em;
    color: var(--text-soft);
    margin: 0 0 10px;
    font-weight: 700;
}
.logs-hero__title {
    font-size: 30px;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 10px;
    line-height: 1.3;
}
.logs-hero__lead {
    font-size: 14px;
    color: var(--text-mute);
    margin: 0;
    line-height: 1.85;
}

/* ====== Status row ====== */
.logs-status {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-mute);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 10px 14px;
    margin-bottom: 22px;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 14px;
    align-items: center;
}
.logs-status__dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #5dbf94;
    margin-right: 4px;
}
.logs-status__dim { color: var(--text-soft); }

/* ====== Status badge ====== */
.status-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
}
.status-badge--resolved  { background: #ebe6f7; color: var(--status-resolved); }
.status-badge--wip       { background: #fbf2dc; color: var(--status-wip); }
.status-badge--insight   { background: #eaddff; color: var(--brand-dark); }
.status-badge--knowledge { background: #e3f2fd; color: #1565c0; }

/* ====== Logs list ====== */
.logs-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.logs-list__item a {
    display: block;
    background: #fff;
    border: 1.5px solid var(--border);
    border-radius: 18px;
    padding: 18px 22px;
    text-decoration: none;
    color: inherit;
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.logs-list__item a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124,108,224,.14);
    border-color: var(--brand-soft);
}
.logs-list__item a:focus-visible {
    outline: 3px solid var(--brand-soft);
    outline-offset: 2px;
}
.logs-list__seq {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-soft);
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 8px;
    flex-wrap: wrap;
}
.logs-list__title {
    font-size: 17px;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 4px;
    line-height: 1.5;
}
.logs-list__meta {
    font-size: 12.5px;
    color: var(--text-mute);
    margin: 0;
}

/* ====== Article ====== */
.log-article {
    background: #fff;
    border: 1.5px solid var(--border);
    border-radius: 24px;
    padding: 32px;
}
.log-article__head {
    border-bottom: 1px dashed var(--border);
    padding-bottom: 20px;
    margin-bottom: 24px;
}
.log-article__seq {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-soft);
    margin: 0 0 10px;
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}
.log-article__title {
    font-size: 26px;
    font-weight: 800;
    color: var(--text);
    margin: 0;
    line-height: 1.4;
}
.log-article__lead {
    font-size: 14px;
    color: var(--text-mute);
    margin: 12px 0 0;
}

.log-section {
    display: flex;
    gap: 18px;
    margin: 28px 0;
    align-items: flex-start;
}
.log-section__num {
    font-family: 'JetBrains Mono', monospace;
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: #f0eaff;
    color: var(--brand-dark);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 800;
    margin-top: 2px;
}
.log-section__body {
    flex-grow: 1;
    min-width: 0;
}
.log-section__title {
    font-size: 15px;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 12px;
}
.log-section__panel {
    background: var(--bg);
    border-left: 3px solid var(--brand-soft);
    border-radius: 10px;
    padding: 14px 18px;
    font-size: 14px;
    line-height: 1.9;
    color: var(--text-mute);
    margin-bottom: 12px;
}
.log-section__panel p { margin: 0 0 10px; }
.log-section__panel p:last-child { margin-bottom: 0; }
.log-section__panel ul { margin: 8px 0 0; padding-left: 22px; }
.log-section__panel li { margin-bottom: 6px; }
.log-section__panel code {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    color: var(--brand-dark);
}
.log-section__panel strong { color: var(--text); font-weight: 700; }
.log-section__panel em { font-style: normal; color: var(--brand); font-weight: 700; }

.code-block {
    background: #2a2347;
    color: #e8e4f5;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    line-height: 1.75;
    padding: 14px 18px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 10px 0;
    white-space: pre;
}
.code-block .kw { color: #c4a8ff; font-weight: 700; }
.code-block .str { color: #b6d7ff; }
.code-block .fn { color: #ffc88f; }
.code-block .cm { color: #8a82a8; font-style: italic; }
.code-block .nm { color: #b6e3ff; }

/* 修正前/後ラベル */
.log-section__label {
    font-size: 12px;
    font-weight: 800;
    margin: 12px 0 4px;
    letter-spacing: .05em;
}
.log-section__label--before { color: #c25a5a; }
.log-section__label--after  { color: #4a9d6e; }

/* ====== Quote ====== */
.logs-quote {
    text-align: center;
    color: var(--text-soft);
    font-style: italic;
    margin: 40px 0 0;
    font-size: 13px;
}

/* ====== Footer ====== */
.tb-footer {
    border-top: 1px solid var(--border);
    background: #fff;
    padding: 22px 16px;
    margin-top: 40px;
}
.tb-footer-inner {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-soft);
}
.tb-footer a {
    color: var(--text-mute);
    text-decoration: none;
    font-weight: 700;
}
.tb-footer a:hover { color: var(--brand); }
.tb-footer__brand { color: var(--brand); font-weight: 800; }

.visually-hidden {
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
}

@media (max-width: 600px) {
    .logs-hero__title  { font-size: 24px; }
    .log-article       { padding: 22px; }
    .log-article__title { font-size: 22px; }
    .log-section       { gap: 12px; }
    .log-section__num  { width: 28px; height: 28px; font-size: 12px; }
    .tb-nav            { gap: 12px; font-size: 12px; }
}