:root {
  --paper: #faf8f4;
  --paper-2: #f2eee6;
  --ink: #14120f;
  --ink-2: #4b463e;
  --ink-3: #8a8378;
  --rule: #ded8cc;
  --accent: #2f5fe0;
  --card: #fffdf9;
  --shadow: 0 1px 2px rgba(20, 18, 15, 0.06), 0 8px 24px rgba(20, 18, 15, 0.05);
  --serif: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo,
    system-ui, sans-serif;
  --tabbar-h: 62px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14120f;
    --paper-2: #1c1a16;
    --ink: #f5f1e9;
    --ink-2: #c2bbae;
    --ink-3: #8b8478;
    --rule: #33302a;
    --accent: #7ea0ff;
    --card: #1b1915;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
  }
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

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

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: none;
}

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

.app {
  max-width: 620px;
  margin: 0 auto;
  padding: 0 20px calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 40px);
  padding-top: env(safe-area-inset-top);
}

.boot {
  padding: 40vh 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
}

/* ---------- マストヘッド ---------- */

.masthead {
  border-bottom: 1px solid var(--rule);
  padding: 26px 0 14px;
  text-align: center;
}

.masthead::before {
  content: "";
  display: block;
  border-top: 1px solid var(--rule);
  margin-bottom: 22px;
}

.wordmark {
  font-family: var(--serif);
  font-size: clamp(30px, 9vw, 40px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin: 0;
}

.masthead-meta {
  margin-top: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--ink-3);
}

/* ---------- 最新号バナー ---------- */

.banner {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 18px 0 4px;
  padding: 13px 16px;
  border: 1px solid var(--rule);
  border-radius: 14px;
  background: var(--paper-2);
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.banner .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

.banner-body {
  flex: 1;
  min-width: 0;
}

.banner-title {
  display: block;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
}

.banner-sub {
  display: block;
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.4;
}

.banner .refresh {
  width: 22px;
  height: 22px;
  flex: none;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
}

.banner.busy .refresh {
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- ヒーロー ---------- */

.hero {
  display: block;
  position: relative;
  margin: 18px -20px 0;
  padding: 34px 24px 30px;
  background: radial-gradient(120% 90% at 20% 0%, #2b2b31 0%, #0b0b0d 70%);
  color: #fff;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 40% at 80% 100%, rgba(255, 255, 255, 0.09), transparent 70%);
  pointer-events: none;
}

.hero-kicker {
  position: relative;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 14px;
}

.hero-title {
  position: relative;
  font-family: var(--serif);
  font-size: clamp(26px, 7.4vw, 34px);
  font-weight: 700;
  line-height: 1.38;
  margin: 0;
  letter-spacing: 0.01em;
}

.hero-excerpt {
  position: relative;
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.62);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 見出し ---------- */

.eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--ink-3);
  margin: 34px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}

/* ---------- 目次 ---------- */

.toc {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc li + li {
  border-top: 1px solid var(--rule);
}

.toc a {
  display: flex;
  gap: 18px;
  padding: 15px 0;
  align-items: baseline;
}

.toc .num {
  font-family: var(--serif);
  font-size: 20px;
  color: var(--ink-3);
  flex: none;
  width: 28px;
}

.toc .t {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
}

/* ---------- 記事カード ---------- */

.section-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 34px 0 14px;
}

.section-head .marker {
  font-family: var(--serif);
  font-size: 19px;
  color: var(--accent);
}

.section-head h2 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0;
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 16px;
  padding: 18px 18px 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}

.card:active {
  transform: scale(0.995);
}

.card h3 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  margin: 0;
}

.card p {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-2);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  margin-top: 12px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  display: flex;
  gap: 10px;
  align-items: center;
}

.card-meta .saved-flag {
  color: var(--accent);
  font-weight: 700;
}

/* ---------- バックナンバー ---------- */

.issue-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.issue-date {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  flex: none;
  width: 108px;
}

.issue-date span {
  display: block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}

.issue-lead {
  flex: 1;
  min-width: 0;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.chev {
  flex: none;
  color: var(--ink-3);
}

/* ---------- 記事詳細 ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  position: sticky;
  top: 0;
  background: var(--paper);
  z-index: 5;
}

.back,
.save-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  color: var(--ink);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 12px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
}

.save-btn.on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.article-kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-top: 12px;
}

.article-title {
  font-family: var(--serif);
  font-size: clamp(24px, 6.6vw, 30px);
  font-weight: 700;
  line-height: 1.45;
  margin: 12px 0 10px;
}

.article-date {
  font-size: 12px;
  color: var(--ink-3);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
}

.article-body {
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--ink);
}

.article-body p {
  margin: 20px 0;
}

.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.sources {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.sources h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  margin: 0 0 12px;
}

.source-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  margin-bottom: 8px;
  background: var(--card);
  font-size: 13px;
}

.source-link .host {
  font-size: 11px;
  color: var(--ink-3);
  flex: none;
}

.article-nav {
  display: flex;
  gap: 10px;
  margin-top: 28px;
}

.article-nav a {
  flex: 1;
  padding: 14px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  font-size: 12px;
  color: var(--ink-2);
  background: var(--card);
}

.article-nav .lbl {
  display: block;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  margin-bottom: 4px;
}

.article-nav .t {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 空状態・注記 ---------- */

.empty {
  text-align: center;
  color: var(--ink-3);
  font-size: 13px;
  padding: 60px 20px;
  line-height: 2;
}

.colophon {
  margin: 36px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-size: 11px;
  color: var(--ink-3);
  line-height: 1.8;
}

.install-hint {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px dashed var(--rule);
  border-radius: 12px;
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.7;
}

/* ---------- タブバー ---------- */

.tabbar {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(env(safe-area-inset-bottom) + 10px);
  display: flex;
  gap: 4px;
  padding: 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--card) 88%, transparent);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  z-index: 20;
}

.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--ink-3);
}

.tab svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.tab svg .fg {
  stroke: var(--card);
  stroke-width: 1.6;
  stroke-linecap: round;
  fill: none;
}

.tab[aria-current="page"] {
  background: var(--paper-2);
  color: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}