:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1c1f24;
  --muted: #5d6573;
  --border: #d9dde3;
  --accent: #2f7d32;
  --accent-text: #ffffff;
  --danger: #b3261e;
  --ok: #2f7d32;
  --friend: #1f6fb2;
  --scrollbar: #c3c8d0;
  --scrollbar-hover: #9aa2ae;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171b;
    --card: #1e2127;
    --text: #e6e8eb;
    --muted: #9aa2ae;
    --border: #343944;
    --accent: #5cb860;
    --accent-text: #0d1a0e;
    --danger: #f2827a;
    --ok: #7bd07f;
    --friend: #6aa8e0;
    --scrollbar: #3d434e;
    --scrollbar-hover: #565e6c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.6;
}

/* 頁面固定為視窗高度，只有分頁內容的框框在框內捲動，外層不出現捲軸 */
html,
body {
  height: 100%;
}

body {
  overflow: hidden;
}

main {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 24px;
}

header {
  flex: none;
}

/* 高度跟著內容，超過視窗高度才在框內捲動 */
[role="tabpanel"] {
  flex: 0 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
}

[role="tabpanel"][hidden] {
  display: none;
}

/* 分頁內容還沒畫好時先藏起來，畫好後淡入（位置一直保留著，不會跳），見 tab-init.js */
html[data-loading] [role="tabpanel"] {
  opacity: 0;
}

[role="tabpanel"] {
  transition: opacity 0.15s ease-out;
}

@media (prefers-reduced-motion: reduce) {
  [role="tabpanel"] {
    transition: none;
  }
}

/* 重新整理時直接顯示網址上的分頁（?tab=...），不先閃一下「說明」；見 tab-init.js */
html[data-initial-tab] [role="tabpanel"] {
  display: none;
}

html[data-initial-tab="commands"] #commands,
html[data-initial-tab="search"] #search,
html[data-initial-tab="songs"] #songs,
html[data-initial-tab="rooms"] #rooms,
html[data-initial-tab="stats"] #stats,
html[data-initial-tab="account"] #account {
  display: block;
}

html[data-initial-tab] nav button[aria-selected="true"] {
  color: var(--muted);
  border-bottom-color: transparent;
}

html[data-initial-tab="commands"] nav button[data-tab="commands"],
html[data-initial-tab="search"] nav button[data-tab="search"],
html[data-initial-tab="songs"] nav button[data-tab="songs"],
html[data-initial-tab="rooms"] nav button[data-tab="rooms"],
html[data-initial-tab="stats"] nav button[data-tab="stats"],
html[data-initial-tab="account"] nav button[data-tab="account"] {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* 電腦：標題在左、分頁靠右；手機：分頁在標題下面自己一排，可以左右滑 */
header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

h1 {
  margin: 0 0 10px;
  font-size: 1.6rem;
  white-space: nowrap;
}


nav {
  display: flex;
  gap: 4px;
  min-width: 0;
  /* 選取中的底線壓在 header 的分隔線上 */
  margin-bottom: -1px;
  overflow-x: auto;
  scrollbar-width: none;
}

nav::-webkit-scrollbar {
  display: none;
}

nav button {
  background: none;
  color: var(--muted);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 8px 14px;
  font-weight: 600;
  flex: none;
}

nav button[aria-selected="true"] {
  color: var(--text);
  border-bottom-color: var(--accent);
}

section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

label {
  display: block;
  font-weight: 600;
  margin: 16px 0 6px;
}

label:first-child {
  margin-top: 0;
}

.required {
  color: var(--danger);
}

input,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
}

.row {
  display: flex;
  gap: 8px;
}

button {
  padding: 10px 18px;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

form > button {
  margin-top: 16px;
}

.hint {
  margin: 4px 0 0;
  font-size: 0.875rem;
  color: var(--muted);
}

/* 需要特別注意的說明：左邊加一條顏色 */
.notice {
  margin: 12px 0 0;
  padding: 8px 12px;
  border-left: 3px solid var(--danger);
  border-radius: 4px;
  background: var(--bg);
  font-size: 0.9rem;
}

.turnstile {
  margin-top: 16px;
  min-height: 65px;
}

.status {
  margin: 12px 0 0;
  min-height: 1.6em;
}

.status.error {
  color: var(--danger);
}

.status.ok {
  color: var(--ok);
}

#search-result {
  margin-top: 16px;
}

/* 玩家名稱可能有連續空白，要原樣顯示 */
#search-result .status,
.form-title {
  white-space: pre-wrap;
}

.entry {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding: 12px 0;
}

.entry-info {
  flex: 1;
  min-width: 0;
}

.entry-name {
  font-weight: 600;
  white-space: pre-wrap;
  word-break: break-all;
}

.entry-meta {
  color: var(--muted);
  font-size: 0.875rem;
}

h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}

#about p,
#about ul,
#about ol {
  margin: 0 0 16px;
}

#about ul,
#about ol {
  padding-left: 1.4em;
}

#about h2:not(:first-child) {
  margin-top: 24px;
}

.command {
  align-items: center;
}

.command code {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  font-size: 1rem;
  overflow-wrap: anywhere;
  user-select: all;
}

/* 歌曲分頁：篩選框固定在上方，只有清單捲動 */
#songs:not([hidden]) {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#songs > :not(.songs) {
  flex: none;
}

.songs {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.songs li {
  display: flex;
  gap: 12px;
  padding: 6px 0;
  border-top: 1px solid var(--border);
}

.song-index {
  flex: none;
  width: 3.5em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.song-name {
  min-width: 0;
  word-break: break-word;
}

/* 捲軸：細、圓角、跟著淺色／深色主題 */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar) transparent;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border: 2px solid transparent;
  border-radius: 999px;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--scrollbar-hover);
}

/* 長得像按鈕的連結（連線分頁的「加 Xbox 好友」） */
a.button {
  flex: none;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

a.button:not(.secondary) {
  background: var(--accent);
  color: var(--accent-text);
  border: 1px solid var(--accent);
  padding: 6px 14px;
}

/* 房間分頁：YB開房的房間用綠色、/connect 的 WSS 連線用藍色（左邊色條看能不能直接加入），標籤各自上色 */
.entry.joinable,
.entry.friend {
  border-left: 3px solid var(--kind);
  padding-left: 12px;
}

.entry.joinable {
  --kind: var(--accent);
}

.entry.friend {
  --kind: var(--friend);
}

.entry-tag {
  --tag: var(--accent);
  display: inline-block;
  margin-right: 6px;
  padding: 0 6px;
  border: 1px solid var(--tag);
  border-radius: 4px;
  color: var(--tag);
  font-size: 0.75rem;
  font-weight: 600;
  vertical-align: 2px;
}

.entry-tag.wss {
  --tag: var(--friend);
}

.entry.friend a.button.secondary {
  color: var(--friend);
  border-color: var(--friend);
}

button.secondary,
a.button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 6px 14px;
}

#search-result > button.secondary {
  margin-top: 4px;
}

button.link {
  background: none;
  color: var(--accent);
  padding: 0;
  font: inherit;
  font-weight: 600;
}

#search-view > .hint {
  margin-top: 8px;
}

.form-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: -4px 0 12px -8px;
}

.form-title {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
}

button.back {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
}

button.back:hover {
  background: var(--bg);
}

button.back svg {
  width: 22px;
  height: 22px;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.link-button {
  flex: 1 1 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: max-content;
  padding: 9px 8px;
  font-size: 0.9375rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.link-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.link-button svg {
  flex: none;
  width: 18px;
  height: 18px;
}

.stats-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.stats-header h2 {
  margin: 0;
}

.stats-grid {
  display: grid;
  /* 8 張卡片：電腦 4 欄排 2 排，手機 2 欄 */
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}

.stat-label {
  color: var(--muted);
  font-size: 0.875rem;
}

.stat-value {
  margin-top: 2px;
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-detail {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.8125rem;
}

@media (max-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  main {
    padding-top: 20px;
    padding-bottom: 16px;
  }

  header {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  h1 {
    margin-bottom: 8px;
  }
}

/* 一行一個指令；有子指令的分類（例如 !music）把子指令縮排在下面 */
.commands {
  margin-top: 8px;
}

.command-item {
  padding: 14px 0;
  border-top: 1px solid var(--border);
}

/* 指令本身：放大、加底色，一眼看得到 */
.command-name {
  display: inline-block;
  padding: 4px 10px;
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  background: color-mix(in srgb, var(--accent) 10%, var(--card));
  color: var(--accent);
  font-size: 1.05rem;
  font-weight: 700;
}

.subcommand > .command-name {
  font-size: 0.95rem;
}

/* 指令分頁最上面的「怎麼輸入指令」 */
.usage {
  margin: 8px 0 16px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}

.usage h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.usage-row {
  display: grid;
  grid-template-columns: 8rem minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 4px 0;
}

.usage-row p {
  margin: 0;
}

.usage code {
  white-space: nowrap;
}

.usage-form {
  font-weight: 700;
  justify-self: start;
}

.usage-notes {
  margin: 8px 0 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 0.875rem;
}

.command-desc {
  margin: 6px 0 0;
  font-weight: 500;
}

.command-details {
  margin: 4px 0 0;
  color: var(--muted);
}

.command-params-label {
  margin: 8px 0 0;
  font-size: 0.875rem;
}

.command-params {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 4px 16px;
  margin: 2px 0 0 12px;
  font-size: 0.875rem;
}

.command-params dt {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  white-space: nowrap;
}

.command-params dd {
  margin: 0;
}

/* 範例：和說明分開的區塊，左邊是指令、右邊是說明 */
.command-examples {
  margin-top: 10px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: var(--bg);
  font-size: 0.875rem;
}

.command-examples-title {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.command-example {
  display: grid;
  grid-template-columns: minmax(12rem, max-content) minmax(0, 1fr);
  gap: 16px;
  padding: 3px 0;
}

.command-example code {
  padding: 0;
  border: none;
  background: none;
  overflow-wrap: anywhere;
}

.command-example-note {
  color: var(--muted);
}

.commands-heading {
  margin: 20px 0 4px;
  font-size: 1rem;
}

.subcommands {
  margin: 10px 0 0 4px;
  padding-left: 16px;
  border-left: 2px solid var(--border);
}

.command-item.subcommand {
  padding: 10px 0;
}

.command-item.subcommand:first-child {
  border-top: none;
}

#commands > p {
  margin: 0 0 8px;
}

/* 手機上參數名稱和說明上下排 */
@media (max-width: 640px) {
  .command-params {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .command-params dd {
    margin-bottom: 6px;
  }

  .usage-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .command-example {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 4px 0;
  }
}

.server-label {
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--danger);
  color: #fff;
  font-size: 0.8rem;
  vertical-align: middle;
}

.server-version {
  margin-left: 8px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 400;
  vertical-align: middle;
}


/* 房間分頁：下載房主程式 */
.host-download {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0;
}
#rooms h3 {
  margin: 24px 0 0;
}
#rooms details ul {
  margin: 6px 0 0;
  padding-left: 20px;
}
a.button {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-text);
  text-decoration: none;
  font-weight: 600;
}

/* ---- 帳號分頁 ---- */

/* :not([hidden])：id 選擇器比 [hidden] 優先，不加的話其他分頁時也會顯示 */
#account:not([hidden]),
html[data-initial-tab="account"] #account {
  display: grid;
}

#account {
  gap: 16px;
  align-content: start;
  background: none;
  border: none;
  padding: 0;
}

/* 每一塊（設定、意見回饋）是一張卡片 */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.panel-head h2 {
  margin: 0;
  font-size: 1.15rem;
}

.panel-head {
  margin-bottom: 12px;
}

.placeholder {
  margin: 0;
  padding: 16px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  color: var(--muted);
  text-align: center;
}

/* 登入卡片：頭像、說明、按鈕排一排，手機上按鈕換到下一行 */
.account-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 4px 16px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
}

.account-card[data-state="in"] {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  background: color-mix(in srgb, var(--accent) 7%, var(--card));
}

.account-card .avatar {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 18%, var(--card));
  color: var(--accent);
  font-size: 1.4rem;
  font-weight: 700;
}

.account-card[data-state="in"] .avatar {
  background: var(--accent);
  color: var(--accent-text);
}

.account-card .avatar svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.account-body {
  min-width: 0;
}

.account-body > strong {
  display: block;
  font-size: 1.05rem;
}

.account-name {
  overflow-wrap: anywhere;
}

.account-body .hint {
  margin-top: 2px;
}

.account-actions {
  display: flex;
  gap: 8px;
}

.account-actions button,
.account-actions .secondary {
  padding: 8px 18px;
  border-radius: 999px;
}

.account-message {
  grid-column: 1 / -1;
}

@media (max-width: 560px) {
  .account-card {
    grid-template-columns: auto 1fr;
  }
  .account-actions {
    grid-column: 1 / -1;
  }
  .account-actions button {
    flex: 1;
  }
}

/* 登入步驟：1. 打開網址 2. 輸入代碼 */
.login-steps {
  display: grid;
  gap: 10px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.login-steps li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  counter-increment: step;
}

.login-steps li > span::before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 1.5em;
  height: 1.5em;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 0.8em;
  font-weight: 700;
}

.login-steps a.button {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
}

.login-code {
  padding: 6px 14px;
  border: 1px dashed var(--accent);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
}

.login-code[data-copied]::after {
  content: " ✓ 已複製";
  font-family: inherit;
  font-size: 0.8rem;
  letter-spacing: normal;
  color: var(--ok);
}

.waiting {
  margin-top: 10px;
}

/* 舉報、申訴表單上方的小卡片 */
.xbox-login:not([hidden]) {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 16px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  font-size: 0.9rem;
}

.xbox-login[data-state="in"] {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}

.xbox-login > span:first-child {
  flex: 1;
  min-width: 12em;
}

.xbox-login[data-state="in"] > span:first-child {
  flex: none;
  min-width: 0;
}

.xbox-login .secondary {
  border-radius: 999px;
}

.xbox-login .login-steps {
  flex: 1 1 100%;
  margin: 0;
}

.xbox-login .status {
  flex: 1 1 100%;
  margin: 0;
}

/* 設定：分組，開關在右邊 */
#settings-form fieldset {
  margin: 0 0 12px;
  padding: 4px 16px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
}

#settings-form legend {
  padding: 0 6px;
  font-weight: 700;
}

label.toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-weight: normal;
  cursor: pointer;
}

fieldset > label.toggle:last-child {
  border-bottom: none;
}

label.toggle small {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

label.toggle input {
  appearance: none;
  flex: none;
  position: relative;
  width: 44px;
  height: 26px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: var(--border);
  cursor: pointer;
  transition: background 0.15s;
}

label.toggle input::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgb(0 0 0 / 30%);
  transition: transform 0.15s;
}

label.toggle input:checked {
  background: var(--accent);
}

label.toggle input:checked::after {
  transform: translateX(18px);
}

label.toggle input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#settings-form input[type="range"] {
  padding: 0;
  border: none;
  background: none;
  accent-color: var(--accent);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.8rem;
}

#settings-temperature-value {
  margin-left: 6px;
  color: var(--accent);
  font-weight: 700;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin-top: 16px;
}

.form-actions .status {
  margin: 0;
}

/* 窄的手機：卡片的內距小一點，內容才放得下 */
@media (max-width: 400px) {
  section,
  .panel,
  .account-card {
    padding: 16px;
  }
  #settings-form fieldset {
    padding: 4px 12px 10px;
  }
}

/* 保險：分頁內容不要出現水平捲軸（例如很長的網址、代碼） */
[role="tabpanel"] {
  overflow-x: hidden;
}

#settings-form fieldset {
  min-width: 0;
}