/* =========================================
   トピックス横丁 - 夜ふけに灯る話題まとめ通り
   基調カラー：サイバーパンク（ネオンピンク×シアン）
========================================= */

:root {
  /* オモテ：水色×緑×黄色のネオン街 */
  --color-primary: #00e5ff;
  --color-primary-dark: #00a8c6;
  --color-primary-light: #6bf3ff;
  --color-secondary: #39ff6a;
  --color-tertiary: #f9ff2e;
  --color-accent: #1a0b2e;
  --color-bg: #08040f;
  --color-surface: #130a24;
  --color-surface-2: #241640;
  --color-text: #f2eaff;
  --color-text-sub: #9a86c4;
  --color-border: #3a1f5c;
  --color-danger: #ff3860;
  --color-sitename: #8fefff;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow-sm: 0 2px 10px rgba(0, 229, 255, 0.15);
  --shadow-md: 0 0 24px rgba(57, 255, 106, 0.2);
  --glow-primary: 0 0 8px rgba(0, 229, 255, 0.6);
  --glow-secondary: 0 0 10px rgba(57, 255, 106, 0.55);

  --header-height: 64px;
  --max-width: 1280px;
}

/* ウラ：ネオンは残しつつ、色を落として暗くまとめた裏路地風 */
body[data-tag="ura"] {
  --color-primary: #ff2b4d;
  --color-primary-dark: #b8102a;
  --color-primary-light: #ff6b81;
  --color-secondary: #8a2be2;
  --color-tertiary: #ff7a1a;
  --color-accent: #170513;
  --color-bg: #050208;
  --color-surface: #0d0611;
  --color-surface-2: #1c0e1a;
  --color-text: #f5eef2;
  --color-text-sub: #8f7688;
  --color-border: #3a1626;
  --color-danger: #ff3860;
  --color-sitename: #b8102a;

  --shadow-sm: 0 2px 10px rgba(255, 43, 77, 0.12);
  --shadow-md: 0 0 24px rgba(138, 43, 226, 0.2);
  --glow-primary: 0 0 8px rgba(255, 43, 77, 0.55);
  --glow-secondary: 0 0 10px rgba(138, 43, 226, 0.55);
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.empty-state {
  color: var(--color-text-sub);
  padding: 24px 0;
  text-align: center;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: var(--radius-pill);
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #08040f;
  box-shadow: var(--glow-primary);
}

.btn-primary:hover {
  background: var(--color-primary-light);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary-light);
}

.btn-danger {
  background: transparent;
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---------- ヘッダー ---------- */
.site-header {
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 24px;
}

/* ネオン看板風のロゴ。蛍光管の枠＋光が滲む影＋わずかな明滅で再現。 */
.logo {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
  background: rgba(255, 255, 255, 0.03);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  box-shadow:
    0 0 4px var(--color-primary),
    0 0 12px var(--color-primary),
    0 0 26px var(--color-primary),
    inset 0 0 8px var(--color-primary);
  text-shadow:
    0 0 4px #fff,
    0 0 10px var(--color-primary),
    0 0 22px var(--color-primary),
    0 0 42px var(--color-primary);
  animation: neon-flicker 4s infinite ease-in-out;
}

.logo span {
  margin-left: 2px;
  color: #fff;
  text-shadow:
    0 0 4px #fff,
    0 0 10px var(--color-secondary),
    0 0 22px var(--color-secondary),
    0 0 42px var(--color-secondary);
}

@keyframes neon-flicker {
  0%, 19%, 21%, 23%, 54%, 56%, 100% {
    opacity: 1;
  }
  20%, 22%, 55% {
    opacity: 0.82;
  }
}

.header-welcome {
  font-size: 14px;
  color: var(--color-text-sub);
}

/* ---------- ヒーロー ---------- */
.hero {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-tertiary) 50%, var(--color-primary) 100%);
  color: #08040f;
  padding: 20px 20px;
  text-align: center;
}

.hero h1 {
  margin: 0 0 4px;
  font-size: 18px;
}

.hero p {
  margin: 0;
  opacity: 0.92;
  font-size: 12px;
}

/* ウラでは彩度の高いグラデーションではなく、暗く沈んだ配色に切り替える */
body[data-tag="ura"] .hero {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 55%, var(--color-primary-dark) 100%);
  color: var(--color-text);
}

/* ---------- 全サイト横断の最新フィード（縦スクロール） ---------- */
.latest-feed {
  max-height: 420px;
  overflow-y: auto;
  padding: 4px 16px;
  margin-top: 20px;
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.latest-feed-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 13px;
}

.latest-feed-list li:last-child {
  border-bottom: none;
}

.feed-time {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--color-text-sub);
  font-variant-numeric: tabular-nums;
}

.feed-site-name {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-sitename);
  background: var(--color-accent);
  padding: 1px 8px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
}

.latest-feed-list a {
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.latest-feed-list a:hover {
  color: var(--color-primary-light);
}

.section-heading {
  font-size: 15px;
  margin: 28px 0 4px;
  color: var(--color-text-sub);
}

/* ---------- オモテ／ウラ タブ ---------- */
.tag-nav {
  display: flex;
  gap: 10px;
  margin: 20px 0 12px;
}

.tag-nav a {
  padding: 7px 20px;
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  color: var(--color-text-sub);
}

.tag-nav a.active[data-tag="omote"] {
  background: var(--color-primary);
  color: #08040f;
  border-color: var(--color-primary);
  box-shadow: var(--glow-primary);
}

.tag-nav a.active[data-tag="ura"] {
  background: var(--color-secondary);
  color: #08040f;
  border-color: var(--color-secondary);
  box-shadow: var(--glow-secondary);
}

.tag-warning {
  font-size: 12px;
  color: var(--color-secondary);
  margin: 0 0 12px;
}

/* ---------- 配信元サイト最新記事パネル（サイトごとに枠を分けて縦に並べる） ---------- */
.sites-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 8px 0 40px;
}

.site-group {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}

.site-group-name {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-sitename);
  text-shadow: 0 0 8px var(--color-sitename);
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.site-group-posts li {
  padding: 4px 0;
  border-bottom: 1px dashed var(--color-border);
}

.site-group-posts li:last-child {
  border-bottom: none;
}

.site-group-posts a {
  font-size: 12.5px;
  line-height: 1.4;
  color: #fff;
  display: block;
}

.site-group-posts a:hover {
  color: var(--color-primary-light);
}

.empty-state-sm {
  font-size: 12px;
  color: var(--color-text-sub);
  list-style: none;
}

.form-row {
  margin-bottom: 10px;
}

.form-row label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
}

input[type="text"],
input[type="url"],
input[type="email"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
}

textarea {
  resize: vertical;
}

/* ---------- ページレイアウト（左右アフィリエイト欄） ---------- */
.page-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr) 160px;
  gap: 20px;
  align-items: start;
}

.page-main {
  min-width: 0;
}

.ad-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 16px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ad-unit {
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-sub);
  font-size: 12px;
  letter-spacing: 0.05em;
}

@media (max-width: 960px) {
  .page-layout {
    grid-template-columns: 1fr;
  }

  .ad-sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .ad-sidebar .ad-unit {
    flex: 1 1 140px;
    height: 100px;
  }
}

/* ---------- フッター ---------- */
.site-footer {
  text-align: center;
  padding: 28px 20px;
  color: var(--color-text-sub);
  font-size: 13px;
}

/* ---------- 管理者ページ ---------- */
.legal-wrap {
  padding: 32px 20px 60px;
  margin: 0 auto;
}

.legal-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.legal-note {
  color: var(--color-text-sub);
  font-size: 13px;
}

.admin-stats {
  display: flex;
  gap: 16px;
  margin: 16px 0 24px;
}

.stat-box {
  background: var(--color-accent);
  border-radius: var(--radius-md);
  padding: 14px 22px;
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
}

.stat-label {
  font-size: 12px;
  color: var(--color-text-sub);
}

.admin-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 24px;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.form-error {
  color: var(--color-danger);
  font-size: 13px;
  margin-top: 8px;
}

.admin-article-row-main {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  min-width: 0;
}

.admin-article-row-main a {
  font-weight: 600;
  color: var(--color-text);
}

.admin-article-row-main a:hover {
  color: var(--color-primary);
}

.admin-site-block {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.color-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.site-color-edit {
  width: 36px;
  height: 26px;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.admin-site-block:last-child {
  border-bottom: none;
}

.admin-site-post-list {
  margin: 8px 0;
}

.admin-site-post-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  padding: 4px 0;
}

.admin-site-post-list a {
  color: var(--color-text-sub);
}

.admin-site-post-list a:hover {
  color: var(--color-primary);
}

.admin-site-post-form {
  display: flex;
  gap: 8px;
  margin: 8px 0;
}

.admin-site-post-form input {
  flex: 1;
}

.admin-site-block > .site-delete-btn {
  margin-top: 4px;
}

.category-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid;
}

.category-badge.cat-omote {
  color: var(--color-primary-light);
  border-color: var(--color-primary);
}

.category-badge.cat-ura {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.site-category-edit {
  width: auto;
  padding: 4px 8px;
  font-size: 13px;
}

#admin-tag-filter a.active {
  background: var(--color-primary);
  color: #08040f;
  border-color: var(--color-primary);
}