/* ==========================================================================
   2ch風 掲示板 スタイルシート
   ========================================================================== */

:root {
  /* クラシック テーマ変数 (デフォルト) */
  --bg-main: #efefef;
  --bg-surface: #ffffff;
  --bg-sidebar: #f7f7f7;
  --bg-header: #334466;
  --bg-header-text: #ffffff;
  --bg-card: #ffffff;
  --bg-subbar: #e5e9f0;
  --text-main: #111111;
  --text-muted: #666666;
  --text-author: #008000;
  --text-trip: #b85d00;
  --text-title: #b80000;
  --text-link: #0000cc;
  --text-link-hover: #ff0000;
  --border-color: #cccccc;
  --border-light: #e0e0e0;
  --primary-btn: #336699;
  --primary-btn-hover: #254e77;
  --btn-text: #ffffff;
  --popup-bg: #ffffe0;
  --popup-border: #999999;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --aa-font: "MS Pゴシック", "MS PGothic", "IPAMonaPGothic", "Mona", "Saitamaar", "Hiragino Kaku Gothic ProN", sans-serif;
  --base-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Hiragino Sans", "Meiryo", sans-serif;
}

body.theme-dark {
  --bg-main: #12151a;
  --bg-surface: #1e2229;
  --bg-sidebar: #181b22;
  --bg-header: #151922;
  --bg-header-text: #e2e8f0;
  --bg-card: #1e2229;
  --bg-subbar: #252a34;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --text-author: #4ade80;
  --text-trip: #fbbf24;
  --text-title: #f87171;
  --text-link: #60a5fa;
  --text-link-hover: #93c5fd;
  --border-color: #334155;
  --border-light: #2d3748;
  --primary-btn: #2563eb;
  --primary-btn-hover: #1d4ed8;
  --btn-text: #ffffff;
  --popup-bg: #272d38;
  --popup-border: #475569;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

/* リセット & 基本設定 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--base-font);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  font-size: 14px;
  overflow-x: hidden;
}

a {
  color: var(--text-link);
  text-decoration: none;
}

a:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

/* ヘッダー */
#site-header {
  background-color: var(--bg-header);
  color: var(--bg-header-text);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 5px rgba(0,0,0,0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  max-width: 1400px;
  margin: 0 auto;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

#site-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

#site-title a {
  color: var(--bg-header-text);
  text-decoration: none;
}

.header-center {
  flex: 1;
  max-width: 450px;
  margin: 0 16px;
}

.search-box {
  display: flex;
  width: 100%;
}

.search-box input {
  flex: 1;
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px 0 0 4px;
  font-size: 13px;
  outline: none;
  background-color: var(--bg-surface);
  color: var(--text-main);
}

.search-box button {
  padding: 6px 14px;
  background-color: var(--primary-btn);
  color: #fff;
  border: 1px solid var(--primary-btn);
  border-radius: 0 4px 4px 0;
  cursor: pointer;
  font-size: 13px;
  font-weight: bold;
}

.search-box button:hover {
  background-color: var(--primary-btn-hover);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* サブヘッダー (パンくず) */
#sub-header {
  background-color: var(--bg-subbar);
  padding: 6px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
}

#breadcrumbs {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  white-space: nowrap;
}

.bc-sep {
  color: var(--text-muted);
  font-size: 11px;
}

/* ボタン共通 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-main);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  opacity: 0.9;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.btn-primary {
  background-color: var(--primary-btn);
  color: var(--btn-text);
  border-color: var(--primary-btn);
  font-weight: bold;
}

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

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
}

.app-footer {
  margin-top: 40px;
  padding: 20px 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
}
.app-footer p {
  margin-bottom: 4px;
}

.btn-sm {
  padding: 4px 8px;
  font-size: 12px;
}

.btn-xs {
  padding: 2px 6px;
  font-size: 11px;
}

.btn-lg {
  padding: 8px 24px;
  font-size: 15px;
  font-weight: bold;
}

.icon-btn {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.icon-btn:hover {
  background: rgba(255,255,255,0.25);
}

/* レイアウト */
#layout-container {
  display: flex;
  min-height: calc(100vh - 85px);
  max-width: 1400px;
  margin: 0 auto;
}

/* サイドバー */
#sidebar {
  width: 250px;
  flex-shrink: 0;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.2s ease;
}

.sidebar-header h2 {
  font-size: 15px;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--border-color);
}

#board-search-input {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  font-size: 12px;
  background-color: var(--bg-surface);
  color: var(--text-main);
}

#board-list-container {
  overflow-y: auto;
  flex: 1;
}

.category-group {
  margin-bottom: 12px;
}

.category-title {
  font-size: 12px;
  font-weight: bold;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 4px 0;
  cursor: pointer;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.category-title:hover {
  color: var(--text-main);
}

.category-boards {
  list-style: none;
  padding-left: 6px;
  margin-top: 2px;
}

.board-nav-item {
  margin: 2px 0;
}

.board-nav-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 6px;
  border-radius: 3px;
  font-size: 13px;
  color: var(--text-main);
  text-decoration: none;
}

.board-nav-link:hover, .board-nav-link.active {
  background-color: rgba(51, 102, 153, 0.15);
  color: var(--text-link);
  font-weight: bold;
  text-decoration: none;
}

.board-count-badge {
  font-size: 10px;
  background-color: var(--border-light);
  color: var(--text-muted);
  padding: 1px 5px;
  border-radius: 10px;
}

/* メインコンテンツ */
#main-content {
  flex: 1;
  padding: 16px 20px;
  overflow-y: auto;
  max-width: 1150px;
}

.view-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* 1. ホーム画面 */
.welcome-banner {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: 6px;
  border-left: 5px solid var(--primary-btn);
}

.welcome-banner h2 {
  font-size: 1.3rem;
  color: var(--text-title);
  margin-bottom: 8px;
}

.board-grid-section h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.board-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.board-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 14px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.board-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--primary-btn);
}

.board-card-category {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: bold;
}

.board-card-title {
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--text-link);
  margin: 4px 0 6px 0;
}

.board-card-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.4;
}

.board-card-stats {
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
  border-top: 1px dotted var(--border-light);
  padding-top: 6px;
}

/* 2. 板トップ / スレッド一覧画面 */
.board-info-banner {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 14px 18px;
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

#current-board-name {
  font-size: 1.3rem;
  color: var(--text-title);
}

#current-board-desc {
  font-size: 12px;
  color: var(--text-muted);
}

.board-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sort-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}

.sort-selector select {
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-main);
  font-size: 12px;
}

.thread-list-wrapper {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.thread-list-header {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-subbar);
}

.thread-filter-box input {
  padding: 4px 8px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  font-size: 12px;
  background-color: var(--bg-surface);
  color: var(--text-main);
}

.thread-items-container {
  display: flex;
  flex-direction: column;
}

.thread-item-row {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  transition: background-color 0.1s ease;
}

.thread-item-row:last-child {
  border-bottom: none;
}

.thread-item-row:hover {
  background-color: rgba(51, 102, 153, 0.05);
}

.thread-item-main {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: 1;
}

.thread-index-num {
  font-weight: bold;
  color: var(--text-muted);
  font-size: 13px;
  min-width: 26px;
}

.thread-item-title {
  font-size: 14px;
  font-weight: bold;
  color: var(--text-link);
  word-break: break-word;
}

.thread-item-title:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

.thread-res-count {
  font-size: 12px;
  font-weight: bold;
  color: var(--text-title);
}

.thread-item-meta {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  display: flex;
  gap: 8px;
}

/* 3. スレッド閲覧画面 */
.thread-top-bar {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

#current-thread-title {
  font-size: 1.25rem;
  color: var(--text-title);
  margin: 6px 0;
}

.thread-meta-tags {
  display: flex;
  gap: 6px;
  align-items: center;
}

.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background-color: var(--bg-subbar);
  color: var(--text-muted);
  font-weight: bold;
}

.badge-success {
  background-color: rgba(74, 222, 128, 0.2);
  color: #166534;
}

body.theme-dark .badge-success {
  color: #4ade80;
}

.badge-closed {
  background-color: rgba(239, 68, 68, 0.2);
  color: #991b1b;
}

body.theme-dark .badge-closed {
  color: #f87171;
}

/* レス表示領域 */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.post-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 10px 14px;
  transition: border-color 0.15s ease;
}

.post-card:target, .post-card.highlight {
  border-color: #ff9900;
  box-shadow: 0 0 8px rgba(255, 153, 0, 0.4);
}

.post-header {
  font-size: 12px;
  margin-bottom: 6px;
  line-height: 1.6;
  color: var(--text-muted);
}

.post-num {
  font-weight: bold;
  color: var(--text-main);
  cursor: pointer;
  margin-right: 6px;
}

.post-num:hover {
  color: var(--text-link);
  text-decoration: underline;
}

.post-name {
  color: var(--text-author);
  font-weight: bold;
  margin-right: 4px;
}

.post-trip {
  color: var(--text-trip);
  font-weight: bold;
  margin-right: 6px;
}

.post-mail {
  color: var(--text-link);
  margin-right: 6px;
  font-weight: normal;
}

.post-date {
  margin-right: 6px;
}

.post-user-id {
  color: var(--text-muted);
  font-family: monospace;
}

.post-body {
  font-family: var(--aa-font);
  font-size: 14px;
  line-height: 1.35;
  white-space: pre-wrap;
  word-break: break-word;
  padding-left: 8px;
  color: var(--text-main);
}

.anchor-link {
  color: var(--text-link);
  font-weight: bold;
  cursor: pointer;
  text-decoration: none;
}

.anchor-link:hover {
  text-decoration: underline;
  color: var(--text-link-hover);
}

/* レス書き込みカード */
.reply-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 16px;
  margin-top: 10px;
}

.reply-header {
  margin-bottom: 12px;
}

.reply-header h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.reply-tip {
  font-size: 11px;
  color: var(--text-muted);
}

.form-row-compact {
  display: flex;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 10px;
}

.form-group.name-group {
  flex: 2;
  min-width: 180px;
}

.form-group.mail-group {
  flex: 1;
  min-width: 140px;
}

.form-group label {
  font-size: 12px;
  font-weight: bold;
}

.mail-input-wrap {
  display: flex;
  gap: 4px;
}

.mail-input-wrap input {
  flex: 1;
}

input[type="text"], select, textarea {
  padding: 7px 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-surface);
  color: var(--text-main);
  font-size: 13px;
  font-family: inherit;
  outline: none;
}

textarea {
  font-family: var(--aa-font);
  line-height: 1.35;
  resize: vertical;
}

input[type="text"]:focus, select:focus, textarea:focus {
  border-color: var(--primary-btn);
  box-shadow: 0 0 0 2px rgba(51, 102, 153, 0.2);
}

.form-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 6px;
}

.status-msg {
  font-size: 12px;
  color: #16a34a;
}

.status-msg.error {
  color: #dc2626;
}

/* モーダル */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}

.modal-content {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 90%;
  max-width: 600px;
  box-shadow: var(--shadow);
  padding: 20px;
  z-index: 1001;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
  margin-bottom: 14px;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}

.close-btn:hover {
  color: var(--text-main);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  margin-top: 14px;
}

.req {
  color: #dc2626;
}

/* アンカーホバーポップアップ */
.anchor-popup {
  position: fixed;
  z-index: 2000;
  background-color: var(--popup-bg);
  color: var(--text-main);
  border: 1px solid var(--popup-border);
  border-radius: 4px;
  padding: 10px 14px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  max-width: 550px;
  max-height: 400px;
  overflow-y: auto;
  font-size: 13px;
  pointer-events: none;
}

.anchor-popup .post-card {
  background: transparent;
  border: none;
  padding: 0;
  margin-bottom: 8px;
}

.anchor-popup .post-card:last-child {
  margin-bottom: 0;
}

/* ローディング & メッセージ */
.loading-spinner {
  padding: 20px;
  text-align: center;
  color: var(--text-muted);
}

.empty-msg {
  padding: 30px;
  text-align: center;
  color: var(--text-muted);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  #sidebar {
    position: fixed;
    top: 75px;
    left: 0;
    height: calc(100vh - 75px);
    z-index: 99;
    transform: translateX(-100%);
    box-shadow: 4px 0 10px rgba(0,0,0,0.1);
  }

  #sidebar.open {
    transform: translateX(0);
  }

  .header-center {
    display: none;
  }

  #main-content {
    padding: 10px;
  }

  .board-cards-grid {
    grid-template-columns: 1fr;
  }
}