/* ═══════════════════════════════════════════════════════════════
   WordNest — 全站前台樣式
   色板：bg #0C0D0C | shell #C6C7BD | special #C8DD5A
          sky #08A9D1 | safe #40C99A | warning #F08080 | lavender #C3A5E5
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg:       #0C0D0C;
  --surface:  #141514;
  --surface2: #1c1d1c;
  --border:   #2a2b2a;
  --shell:    #C6C7BD;
  --special:  #C8DD5A;
  --sky:      #08A9D1;
  --safe:     #40C99A;
  --warning:  #F08080;
  --lavender: #C3A5E5;
}

/* ── Reset & Base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  min-width: 1536px;
  scroll-behavior: smooth;
}
html.font-lg { font-size: 24px; }

body {
  background: var(--bg);
  color: var(--shell);
  font-family: 'Noto Sans TC', 'Sora', 'Segoe UI', sans-serif;
  line-height: 1.7;
  min-height: 100vh;
}

a { color: var(--sky); text-decoration: none; }
a:hover { color: var(--special); }

/* ── 導覽列 ──────────────────────────────────────────────────── */
.wcn-nav {
  position: sticky; top: 0; z-index: 500;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px; height: 58px;
  background: rgba(12,13,12,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.wcn-nav-brand {
  font-size: 1.1rem; font-weight: 700;
  color: var(--special); text-decoration: none;
  display: flex; align-items: center; gap: 8px; letter-spacing: .03em;
}
.wcn-nav-right { display: flex; align-items: center; gap: 20px; }
.wcn-nav-link  { color: var(--shell); text-decoration: none; font-size: .9rem;
                  display: flex; align-items: center; gap: 5px; transition: color .2s; }
.wcn-nav-link:hover { color: var(--sky); }

.wcn-font-toggle {
  background: transparent; border: 1px solid var(--border);
  color: var(--shell); border-radius: 6px;
  padding: 4px 10px; cursor: pointer; font-size: .9rem;
  transition: all .2s;
}
.wcn-font-toggle:hover,
.wcn-font-toggle.active { border-color: var(--special); color: var(--special); }

/* ── 主內容容器 ───────────────────────────────────────────────── */
.wcn-main { padding: 32px 40px; max-width: 1480px; margin: 0 auto; }

/* ── 通用卡片 ─────────────────────────────────────────────────── */
.wcn-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 24px;
}

/* ── 頁面標題 ─────────────────────────────────────────────────── */
.wcn-page-title {
  font-size: 1.5rem; font-weight: 700; color: var(--special);
  margin-bottom: 24px; display: flex; align-items: center; gap: 10px;
}

/* ── 按鈕系統 ─────────────────────────────────────────────────── */
.wcn-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 20px; border-radius: 8px; border: none;
  cursor: pointer; font-size: .9rem; font-weight: 600;
  text-decoration: none; transition: all .25s; font-family: inherit;
}
.wcn-btn-primary { background: var(--special); color: #0C0D0C; }
.wcn-btn-primary:hover { background: #b5c950; color: #0C0D0C; transform: translateY(-1px); }
.wcn-btn-sky     { background: var(--sky); color: #0C0D0C; }
.wcn-btn-sky:hover { opacity: .85; transform: translateY(-1px); }
.wcn-btn-ghost   { background: transparent; border: 1px solid var(--border); color: var(--shell); }
.wcn-btn-ghost:hover { border-color: var(--sky); color: var(--sky); }
.wcn-btn-danger  { background: transparent; border: 1px solid var(--warning); color: var(--warning); }
.wcn-btn-danger:hover { background: rgba(240,128,128,.1); }

/* ── 表單元件 ─────────────────────────────────────────────────── */
.wcn-input {
  background: var(--bg); border: 1px solid var(--border);
  color: var(--shell); border-radius: 8px; padding: 10px 16px;
  font-size: 1rem; width: 100%; transition: border-color .2s;
  font-family: inherit;
}
.wcn-input:focus { outline: none; border-color: var(--special); }

/* ── 狀態徽章 ─────────────────────────────────────────────────── */
.wcn-badge {
  display: inline-block; border-radius: 4px;
  padding: 2px 10px; font-size: .78rem; font-weight: 600; letter-spacing: .02em;
}
.wcn-badge-new      { background: rgba(198,199,189,.12); color: var(--shell); }
.wcn-badge-studying { background: rgba(8,169,209,.18);   color: var(--sky); }
.wcn-badge-done     { background: rgba(64,201,154,.18);  color: var(--safe); }

/* ── Bootstrap Alert 覆蓋（深色主題）─────────────────────────── */
.alert-wcn-ok  { background: rgba(64,201,154,.15);  border: 1px solid var(--safe);    color: var(--safe);    border-radius: 8px; }
.alert-wcn-err { background: rgba(240,128,128,.15); border: 1px solid var(--warning); color: var(--warning); border-radius: 8px; }
.alert-wcn-inf { background: rgba(8,169,209,.15);   border: 1px solid var(--sky);     color: var(--sky);     border-radius: 8px; }

/* ── 公告橫幅 ─────────────────────────────────────────────────── */
.wcn-announcement {
  border-left: 3px solid var(--special); background: rgba(200,221,90,.06);
  padding: 12px 18px; border-radius: 0 8px 8px 0;
  font-size: .95rem; margin-bottom: 16px;
}

/* ── 單字包列表 ───────────────────────────────────────────────── */
.wcn-pack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}
.wcn-pack-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 22px; transition: all .25s; cursor: pointer;
  display: flex; flex-direction: column; gap: 10px;
}
.wcn-pack-card:hover {
  border-color: var(--sky); transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(8,169,209,.12);
}
.wcn-pack-name { font-size: 1.1rem; font-weight: 700; color: var(--special); }
.wcn-pack-desc { font-size: .9rem; color: rgba(198,199,189,.75); line-height: 1.6; }
.wcn-pack-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.wcn-tag {
  background: rgba(195,165,229,.12); color: var(--lavender);
  border-radius: 4px; padding: 2px 10px; font-size: .78rem; cursor: pointer;
  border: 1px solid rgba(195,165,229,.25); transition: all .2s;
}
.wcn-tag:hover, .wcn-tag.active { background: rgba(195,165,229,.25); }
.wcn-pack-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 6px; padding-top: 12px; border-top: 1px solid var(--border);
}

/* ── 段落列表 ─────────────────────────────────────────────────── */
.wcn-para-list { display: flex; flex-direction: column; gap: 12px; }
.wcn-para-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 18px 22px;
  display: flex; align-items: center; gap: 16px;
  transition: all .2s; cursor: pointer;
}
.wcn-para-item:hover { border-color: var(--sky); }
.wcn-para-item:hover .wcn-para-title { color: var(--sky); }
.wcn-para-num {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(200,221,90,.12); color: var(--special);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .9rem; flex-shrink: 0;
}
.wcn-para-title { font-weight: 600; font-size: 1rem; flex: 1; }

/* ── 三欄段落詳情 ─────────────────────────────────────────────── */
.wcn-three-col {
  display: grid;
  grid-template-columns: 260px 1fr 300px;
  gap: 0;
  height: calc(100vh - 90px);
  overflow: hidden;
}
.wcn-col-words {
  border-right: 1px solid var(--border);
  overflow-y: auto; padding: 20px 16px;
  display: flex; flex-direction: column; gap: 6px;
}
.wcn-col-text {
  overflow-y: auto; padding: 28px 36px;
  line-height: 2; font-size: 1.05rem;
}
.wcn-col-panel {
  border-left: 1px solid var(--border);
  padding: 20px 18px; overflow-y: auto;
}

/* 左側單字清單項目 */
.wcn-word-item {
  padding: 9px 12px; border-radius: 8px; cursor: pointer;
  border: 1px solid transparent; transition: all .2s;
  font-size: .95rem;
}
.wcn-word-item:hover { background: rgba(200,221,90,.07); border-color: rgba(200,221,90,.2); }
.wcn-word-item.active { background: rgba(200,221,90,.12); border-color: var(--special); color: var(--special); }
.wcn-word-def { font-size: .78rem; color: rgba(198,199,189,.55); margin-top: 2px; }
.wcn-word-fav { float: right; color: rgba(198,199,189,.3); cursor: pointer; transition: color .2s; }
.wcn-word-fav:hover, .wcn-word-fav.active { color: var(--special); }

/* 段落文章內目標單字 */
.wcn-word {
  color: var(--sky); border-bottom: 1px dashed var(--sky);
  cursor: pointer; transition: all .2s; border-radius: 2px;
  padding: 0 2px;
}
.wcn-word:hover { background: rgba(8,169,209,.1); }
.wcn-word.active { background: rgba(200,221,90,.15); color: var(--special);
                   border-bottom-color: var(--special); }

/* 右側搭配詞面板 */
.wcn-panel-empty {
  height: 100%; display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 12px; opacity: .4;
  font-size: .9rem; text-align: center;
}
.wcn-colloc { padding: 4px 0; }
.wcn-colloc-word {
  font-size: 1.2rem; font-weight: 700; color: var(--special);
  margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--border);
}
.wcn-colloc-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.wcn-colloc-item {
  display: inline-block; background: rgba(195,165,229,.12);
  color: var(--lavender); border-radius: 4px;
  padding: 3px 10px; font-size: .9rem; margin-bottom: 4px;
}
.wcn-colloc-ex {
  font-size: .85rem; color: rgba(198,199,189,.88);
  font-style: italic; padding-left: 4px; line-height: 1.65;
}

/* ── 評量頁 ───────────────────────────────────────────────────── */
.wcn-assessment {
  max-width: 900px; margin: 0 auto;
}
.wcn-blank-input {
  display: inline-block; min-width: 100px; width: auto;
  border: none; border-bottom: 2px solid var(--sky);
  background: transparent; color: var(--special);
  font-size: 1rem; text-align: center; padding: 2px 8px;
  font-family: inherit; outline: none; transition: border-color .2s;
  vertical-align: baseline;
}
.wcn-blank-input:focus { border-bottom-color: var(--special); }
.wcn-blank-input.correct  { border-bottom-color: var(--safe);    color: var(--safe); }
.wcn-blank-input.wrong    { border-bottom-color: var(--warning);  color: var(--warning); }

.wcn-match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.wcn-match-col  { display: flex; flex-direction: column; gap: 8px; }
.wcn-match-item {
  padding: 12px 16px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--border); transition: all .2s; font-size: .95rem;
}
.wcn-match-item:hover     { border-color: var(--sky); }
.wcn-match-item.selected  { border-color: var(--special); background: rgba(200,221,90,.1); color: var(--special); }
.wcn-match-item.matched   { border-color: var(--safe); background: rgba(64,201,154,.1); color: var(--safe); cursor: default; }
.wcn-match-item.wrong-match { border-color: var(--warning); animation: wcn-shake .4s ease; }

@keyframes wcn-shake {
  0%,100%{ transform: translateX(0); }
  20%,60%{ transform: translateX(-5px); }
  40%,80%{ transform: translateX(5px); }
}

/* 分數顯示 */
.wcn-score-ring {
  width: 120px; height: 120px; border-radius: 50%;
  border: 6px solid var(--border); display: flex;
  flex-direction: column; align-items: center; justify-content: center;
  font-size: 2rem; font-weight: 700; color: var(--special);
  margin: 0 auto 20px; position: relative;
}

/* ── 收藏頁 ───────────────────────────────────────────────────── */
.wcn-fav-table { width: 100%; border-collapse: collapse; }
.wcn-fav-table th {
  color: var(--special); border-bottom: 1px solid var(--border);
  padding: 10px 14px; text-align: left; font-size: .9rem; font-weight: 600;
}
.wcn-fav-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: .95rem; }
.wcn-fav-table tr:hover td { background: rgba(255,255,255,.02); }

/* ── 首頁（block 佈局，margin:auto 置中——最可靠方式）─────────── */
.wcn-home {
  min-height: 100vh;
  /* 不用 display:flex 做水平置中，改由子元素各自 margin:auto */
  padding: 44px 40px 36px;
  position: relative;
  box-sizing: border-box;
}
.wcn-home-hero {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 14px;
}
.wcn-home-logo {
  font-size: 2rem; font-weight: 700; color: var(--special);
  letter-spacing: -.02em; margin-bottom: 6px;
}
.wcn-home-tagline {
  font-size: .95rem; color: rgba(198,199,189,.85); max-width: 520px;
  margin: 0 auto 14px; line-height: 1.7;
}
.wcn-features {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 12px; text-align: left;
}
.wcn-feature-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 9px; padding: 13px 15px; transition: border-color .2s;
}
.wcn-feature-card:hover { border-color: #4285EB; }
.wcn-feature-icon { font-size: 1.1rem; margin-bottom: 5px; }
.wcn-feature-title { font-weight: 700; color: var(--special); margin-bottom: 3px; font-size: .87rem; }
.wcn-feature-desc  { font-size: .8rem; color: rgba(198,199,189,.82); line-height: 1.6; }

.wcn-home-panels {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 14px; max-width: 860px; margin: 14px auto 0;
}
.wcn-home-panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 11px; padding: 20px 22px;
}
.wcn-home-panel-title {
  font-size: .9rem; font-weight: 700; color: #4285EB;
  margin-bottom: 12px; display: flex; align-items: center; gap: 7px;
}

/* 邀請碼卡片 */
.wcn-code-cards { display: flex; flex-direction: column; gap: 8px; }
.wcn-code-option {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg); border: 1px solid var(--border); border-radius: 7px;
  padding: 10px 14px; cursor: pointer; transition: all .2s; gap: 12px;
}
.wcn-code-option:hover { border-color: var(--special); }
.wcn-code-option.chosen { border-color: var(--safe); background: rgba(64,201,154,.06); }
.wcn-code-text { font-size: 1rem; font-weight: 700; letter-spacing: .1em; color: var(--shell); font-family: 'Courier New', monospace; }
.wcn-code-pick { font-size: .78rem; color: var(--safe); }

/* ── Scrollbar 樣式 ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #3a3b3a; }