:root {
  --navy: #0f2b46;
  --navy-2: #173d61;
  --blue: #2d6f9f;
  --sky: #dceaf5;
  --cream: #f7f4ee;
  --white: #ffffff;
  --text: #1d2a35;
  --muted: #667784;
  --border: #dbe3e9;
  --success: #3e8f6f;
  --warning: #d49a42;
  --danger: #bd5a5a;
  --shadow: 0 12px 32px rgba(15, 43, 70, 0.10);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Noto Sans TC", system-ui, sans-serif;
  background: #f3f6f8;
  color: var(--text);
}
button, input, select { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }
.hidden { display: none !important; }

.login-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
}
.login-brand {
  background: linear-gradient(145deg, rgba(15,43,70,.97), rgba(45,111,159,.94)),
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.18), transparent 30%);
  color: white;
  padding: 64px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}
.login-brand::after {
  content: "✦";
  position: absolute;
  right: 8%;
  top: 8%;
  font-size: 220px;
  opacity: .08;
}
.brand-mark {
  display: flex;
  gap: 14px;
  align-items: center;
}
.logo-star {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.38);
  border-radius: 16px;
  font-size: 28px;
  background: rgba(255,255,255,.08);
}
.brand-title h1 { margin: 0; font-size: 28px; }
.brand-title p { margin: 3px 0 0; opacity: .8; }
.hero-copy { max-width: 620px; }
.hero-copy h2 { font-size: clamp(32px, 4vw, 58px); line-height: 1.2; margin: 0 0 20px; }
.login-slogan { white-space: nowrap; letter-spacing: -0.035em; }
.hero-copy p { font-size: 18px; line-height: 1.8; opacity: .9; }
.login-panel {
  background: var(--cream);
  display: grid;
  place-items: center;
  padding: 40px;
}
.login-card {
  width: min(430px, 100%);
  background: white;
  padding: 36px;
  border-radius: 24px;
  box-shadow: var(--shadow);
}
.login-card h2 { margin: 0 0 8px; }
.login-card .lead { color: var(--muted); margin: 0 0 28px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.field input, .field select {
  width: 100%;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: white;
}
.field input:focus, .field select:focus { outline: 2px solid #b9d7ec; border-color: var(--blue); }
.primary-btn, .secondary-btn, .danger-btn, .ghost-btn {
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 700;
}
.primary-btn { background: var(--navy); color: white; }
.primary-btn:hover { background: var(--navy-2); }
.secondary-btn { background: var(--sky); color: var(--navy); }
.danger-btn { background: #f5dddd; color: #8e3434; }
.ghost-btn { background: transparent; color: var(--navy); border: 1px solid var(--border); }
.full { width: 100%; }
.login-help {
  margin-top: 20px;
  padding: 14px;
  border-radius: 12px;
  background: #f6f8fa;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}
.error { color: var(--danger); font-size: 14px; margin-top: 10px; }

.app-shell { min-height: 100vh; display: grid; grid-template-columns: 250px 1fr; }
.sidebar {
  background: var(--navy);
  color: white;
  padding: 24px 18px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.sidebar .brand-mark { margin-bottom: 30px; padding: 0 6px; }
.sidebar .logo-star { width: 44px; height: 44px; border-radius: 13px; font-size: 22px; }
.sidebar .brand-title h1 { font-size: 18px; }
.sidebar .brand-title p { font-size: 12px; }
.nav-list { display: grid; gap: 8px; }
.nav-btn {
  width: 100%;
  text-align: left;
  border: 0;
  color: rgba(255,255,255,.82);
  background: transparent;
  padding: 12px 14px;
  border-radius: 12px;
}
.nav-btn:hover, .nav-btn.active { background: rgba(255,255,255,.12); color: white; }
.sidebar-footer { position: absolute; bottom: 20px; left: 18px; right: 18px; }
.user-mini { border-top: 1px solid rgba(255,255,255,.15); padding-top: 16px; }
.user-mini strong { display: block; }
.user-mini span { font-size: 12px; opacity: .7; }

.main { padding: 30px 34px 60px; min-width: 0; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 26px; }
.topbar h2 { margin: 0; font-size: 26px; }
.topbar p { margin: 5px 0 0; color: var(--muted); }
.top-actions { display: flex; gap: 10px; }
.card {
  background: white;
  border: 1px solid #e6ecef;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(15,43,70,.05);
}
.welcome {
  padding: 30px;
  background: linear-gradient(135deg, var(--navy), var(--blue));
  color: white;
  position: relative;
  overflow: hidden;
}
.welcome::after { content: "✦"; position: absolute; right: 30px; top: -25px; font-size: 150px; opacity: .09; }
.welcome h3 { margin: 0 0 8px; font-size: 28px; }
.welcome p { margin: 0; opacity: .84; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 20px 0; }
.stat-card { padding: 20px; }
.stat-card span { color: var(--muted); font-size: 14px; }
.stat-card strong { display: block; font-size: 28px; margin-top: 6px; }
.section-head { display: flex; justify-content: space-between; align-items: center; margin: 28px 0 14px; }
.section-head h3 { margin: 0; }
.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.course-card { overflow: hidden; }
.course-cover {
  height: 145px;
  padding: 18px;
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(135deg, #1a476f, #6d97b9);
}
.course-cover.alt { background: linear-gradient(135deg, #4b5f76, #a8876f); }
.course-cover.green { background: linear-gradient(135deg, #3d6959, #7fa48f); }
.course-cover small { opacity: .8; }
.course-cover h4 { margin: 0; font-size: 20px; }
.course-body { padding: 18px; }
.course-body p { min-height: 48px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.progress-row { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 8px; }
.progress-track { height: 8px; background: #edf1f3; border-radius: 999px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--success); }
.course-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; }
.badge { display: inline-flex; padding: 5px 9px; border-radius: 999px; font-size: 12px; background: var(--sky); color: var(--navy); }
.badge.success { background: #dff1e9; color: #2f765b; }
.badge.warning { background: #f8ead4; color: #996a24; }

.course-layout { display: grid; grid-template-columns: 1fr 320px; gap: 20px; }
.video-wrap { position: relative; padding-top: 56.25%; background: #111; border-radius: 18px; overflow: hidden; }
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.lesson-content { padding: 24px; margin-top: 18px; }
.lesson-content h3 { margin-top: 0; }
.lesson-content p, .lesson-content li { color: var(--muted); line-height: 1.8; }
.side-card { padding: 20px; height: fit-content; position: sticky; top: 24px; }
.lesson-item {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  align-items: center;
}
.lesson-item:last-child { border-bottom: 0; }
.lesson-dot { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; background: #eef2f5; font-size: 12px; }
.lesson-dot.done { background: #dff1e9; color: #2f765b; }

.table-card { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 14px 16px; border-bottom: 1px solid var(--border); text-align: left; font-size: 14px; }
th { background: #f7f9fa; color: var(--muted); font-weight: 600; }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.status-active { background: var(--success); }
.status-disabled { background: var(--danger); }
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar input, .toolbar select { padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; }
.empty { padding: 50px; text-align: center; color: var(--muted); }

@media (max-width: 980px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-brand { min-height: 360px; padding: 36px; }
  .hero-copy h2 { font-size: clamp(30px, 6vw, 46px); }
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .sidebar-footer { position: static; margin-top: 20px; }
  .nav-list { grid-template-columns: repeat(4, 1fr); }
  .course-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .course-layout { grid-template-columns: 1fr; }
  .side-card { position: static; }
}
@media (max-width: 640px) {
  .login-brand { min-height: 300px; padding: 28px; }
  .hero-copy h2 { font-size: clamp(22px, 7.2vw, 36px); }
  .login-panel { padding: 18px; }
  .login-card { padding: 26px 22px; }
  .main { padding: 22px 16px 40px; }
  .topbar { align-items: flex-start; flex-direction: column; }
  .stats-grid, .course-grid { grid-template-columns: 1fr; }
  .nav-list { grid-template-columns: repeat(2, 1fr); }
  .welcome { padding: 24px; }
}
.admin-form-card{padding:22px;margin-bottom:18px}.section-head.compact{margin:0 0 18px}.course-form textarea{width:100%;padding:13px 14px;border-radius:12px;border:1px solid var(--border);font:inherit;resize:vertical}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.span-2{grid-column:1/-1}.switch-row{display:flex;gap:10px;align-items:center;padding:6px 0}.switch-row input{width:18px;height:18px}.form-actions{display:flex;align-items:center;gap:14px;margin-top:18px}.form-message{font-size:14px}.table-title{display:flex;justify-content:space-between;align-items:center;padding:20px 22px}.table-title h3{margin:0}.table-title span,.table-desc{display:block;color:var(--muted);font-size:12px;margin-top:4px}.action-cell{display:flex;gap:7px;white-space:nowrap}.action-cell button{padding:8px 10px}.sidebar .nav-list{overflow:auto;max-height:calc(100vh - 190px)}
@media(max-width:640px){.form-grid{grid-template-columns:1fr}.span-2{grid-column:auto}.table-title{align-items:flex-start;flex-direction:column;gap:4px}}

.login-help{font-size:13px;color:#6d7680;text-align:center;margin:12px 0 0}.account-toolbar{align-items:end}.account-toolbar input[type=text]{min-width:180px}
.article-text p{font-size:16px;line-height:1.95;color:#3e4b57;margin:0 0 18px}.content-images{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:22px 0}.content-images img{width:100%;max-height:520px;object-fit:contain;background:#f4f6f7;border-radius:14px;border:1px solid var(--border)}.lesson-actions{display:flex;gap:10px;margin-top:24px}.culture-hero{padding:42px;background:linear-gradient(135deg,#123754,#3676a3);color:#fff;margin-bottom:18px;overflow:hidden;position:relative}.culture-hero:after{content:'✦';position:absolute;right:45px;top:-40px;font-size:180px;opacity:.09}.culture-hero span{font-size:13px;letter-spacing:.12em;opacity:.75}.culture-hero h3{font-size:36px;margin:10px 0 8px}.culture-hero p{margin:0;opacity:.85}.culture-content{padding:30px}.field small{display:block;color:var(--muted);margin-top:6px}
@media(max-width:640px){.content-images{grid-template-columns:1fr}.culture-hero{padding:28px}.culture-hero h3{font-size:30px}.lesson-actions{flex-direction:column}}

/* v6 分類與搜尋 */
.course-filter{padding:18px 20px;margin-bottom:20px}.filter-row{display:grid;grid-template-columns:2fr 1fr;gap:14px}.course-filter .field{margin:0}.section-head>span{color:var(--muted);font-size:14px}.category-manager{padding:22px;margin-bottom:18px}.category-add-row{display:grid;grid-template-columns:minmax(220px,1fr) 120px auto minmax(120px,1fr);gap:10px;align-items:center;margin:16px 0}.category-add-row input{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:10px;background:#fff}.category-list{display:grid;gap:9px}.category-item{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#fbfcfd}.category-item strong,.category-item small{display:block}.category-item small{margin-top:4px;color:var(--muted)}
@media(max-width:760px){.filter-row{grid-template-columns:1fr}.category-add-row{grid-template-columns:1fr}.category-item{align-items:flex-start;flex-direction:column}.category-item .action-cell{width:100%;flex-wrap:wrap}}


/* v7 我的最愛 */
.course-cover{position:relative}.favorite-btn{position:absolute;right:14px;top:14px;width:38px;height:38px;border:0;border-radius:999px;background:rgba(255,255,255,.92);color:#5f6d78;font-size:24px;line-height:1;display:grid;place-items:center;box-shadow:0 4px 12px rgba(0,0,0,.12);cursor:pointer}.favorite-btn.active{color:#c34f67;background:#fff}.favorite-btn:hover{transform:scale(1.05)}.lesson-title-row{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.lesson-title-row h3{margin:0}.favorite-inline{border:1px solid #e7bcc6;background:#fff7f9;color:#a44359;border-radius:999px;padding:9px 13px;font-weight:700;white-space:nowrap}.favorite-inline.active{background:#f7dfe5;color:#8d3047}@media(max-width:640px){.lesson-title-row{flex-direction:column}.favorite-inline{align-self:flex-start}}

/* v8：首頁熱門、繼續學習與分類式學習紀錄 */
.dashboard-gap{margin-top:30px}
.text-link{border:0;background:transparent;color:#254f78;font-weight:700;cursor:pointer;padding:6px 0}
.record-category-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:24px}
.record-category{padding:18px;text-align:left;border:1px solid transparent;cursor:pointer;display:flex;flex-direction:column;gap:7px}
.record-category:hover,.record-category.active{border-color:#335f89;box-shadow:0 8px 24px rgba(35,71,105,.12)}
.record-category span{font-size:14px;color:#66788a}
.record-category strong{font-size:20px;color:#20384f}
.record-category small{color:#6f7f8d}
@media(max-width:900px){.record-category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.record-category-grid{grid-template-columns:1fr}}

/* v9：課程管理拆頁與批次處理 */
.nav-section-label{padding:18px 14px 7px;color:rgba(255,255,255,.55);font-size:12px;font-weight:700;letter-spacing:.08em}.nav-btn.nav-sub{padding-left:24px;font-size:14px}.bulk-panel{padding:18px 20px;margin-bottom:18px}.bulk-toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.bulk-summary{display:flex;flex-direction:column;gap:4px}.bulk-summary span{font-size:13px;color:var(--muted)}.bulk-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.bulk-actions select{padding:9px 11px;border:1px solid var(--border);border-radius:10px;background:#fff}.check-col{width:44px;text-align:center}.check-col input{width:18px;height:18px;cursor:pointer}.selected-row{background:#f0f6fb}.table-title>div h3{margin:0}
@media(max-width:760px){.bulk-toolbar{align-items:flex-start;flex-direction:column}.bulk-actions{width:100%}.bulk-actions button,.bulk-actions select{flex:1;min-width:130px}}

/* v10：同一課程最多 10 支 YouTube 影片 */
.youtube-link-grid{display:grid;gap:10px;margin-top:6px}.youtube-link-row{display:grid;grid-template-columns:32px 1fr;gap:10px;align-items:center}.youtube-link-row span{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:#eef2f6;font-weight:700;color:#34495e}.course-video-block{margin-bottom:18px}.video-part-title{font-weight:700;margin:0 0 8px;color:#334155}.course-video-block .video-wrap{margin:0}

/* v11：分類色、首頁四欄、緊湊學習紀錄、帳號搜尋與批次管理 */
.course-cover,.course-cover.alt,.course-cover.green{background:linear-gradient(135deg,color-mix(in srgb,var(--category-color,#3f78a4) 82%,#163a59),color-mix(in srgb,var(--category-color,#3f78a4) 82%,#ffffff))}
.dashboard-course-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.dashboard-course-grid .course-cover{height:132px}.dashboard-course-grid .course-cover h4{font-size:18px}.dashboard-course-grid .course-body{padding:16px}.dashboard-course-grid .course-body p{font-size:13px}
.compact-record-grid{grid-template-columns:repeat(5,minmax(150px,1fr));gap:10px}
.record-category.compact{padding:12px 14px;gap:3px;min-height:92px;border-left:4px solid var(--cat)}
.record-category.compact span{display:flex;align-items:center;gap:7px;font-size:13px}.record-category.compact strong{font-size:17px}.record-category.compact small{font-size:12px}
.record-category.compact:hover,.record-category.compact.active{border-color:color-mix(in srgb,var(--cat) 70%,#d7e0e8);border-left-color:var(--cat);background:color-mix(in srgb,var(--cat) 8%,#fff);box-shadow:0 6px 18px color-mix(in srgb,var(--cat) 16%,transparent)}
.category-dot{width:8px;height:8px;border-radius:50%;background:var(--cat);display:inline-block;flex:0 0 auto}.category-pill{display:inline-flex;align-items:center;padding:5px 9px;border-radius:999px;background:color-mix(in srgb,var(--cat) 12%,#fff);border:1px solid color-mix(in srgb,var(--cat) 28%,#fff);color:color-mix(in srgb,var(--cat) 82%,#15293b);font-size:12px;font-weight:700}
.category-add-row-color{grid-template-columns:minmax(220px,1fr) 120px 110px auto minmax(120px,1fr)}.color-field{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:10px;padding:5px 9px;background:#fff}.color-field span{font-size:12px;color:var(--muted)}.color-field input[type=color]{width:42px;height:34px;padding:2px;border:0;background:transparent;cursor:pointer}.category-info{display:flex;align-items:center;gap:10px}.category-swatch{width:14px;height:34px;border-radius:999px;display:block}.inline-color{display:flex;align-items:center;gap:5px;padding:5px 8px;border:1px solid var(--border);border-radius:10px}.inline-color input{width:28px;height:28px;border:0;padding:0;background:transparent}.inline-color span{font-size:12px;color:var(--muted)}
.account-create-card{padding:22px;margin-bottom:18px}.account-manage-card{padding:0 22px 22px}.helper-text{font-size:13px;color:var(--muted)}.account-filters{display:grid;grid-template-columns:minmax(260px,2fr) repeat(4,minmax(130px,1fr)) auto;gap:9px;margin:0 0 14px}.account-filters input,.account-filters select,.account-bulk-toolbar input{padding:10px 11px;border:1px solid var(--border);border-radius:10px;background:#fff;min-width:0}.account-bulk-toolbar{padding:13px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-bottom:8px}.account-table-wrap{overflow:auto}.account-table-wrap table{width:100%;border-collapse:collapse;min-width:1080px}.account-table-wrap th,.account-table-wrap td{padding:11px 10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:middle}.note-cell{max-width:220px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--muted)}
@media(max-width:1200px){.dashboard-course-grid{grid-template-columns:repeat(4,minmax(230px,1fr));overflow-x:auto;padding-bottom:8px}.dashboard-course-grid .course-card{min-width:230px}.compact-record-grid{grid-template-columns:repeat(4,minmax(150px,1fr))}.account-filters{grid-template-columns:1fr 1fr 1fr}}
@media(max-width:760px){.dashboard-course-grid{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:14px}.dashboard-course-grid .course-card{min-width:82vw;scroll-snap-align:start}.compact-record-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.category-add-row-color{grid-template-columns:1fr}.account-filters{grid-template-columns:1fr}.account-toolbar>*{width:100%}.account-bulk-toolbar{align-items:flex-start}.account-bulk-toolbar .bulk-actions{width:100%}.account-bulk-toolbar .bulk-actions>*{flex:1 1 140px}}

/* v12：首頁狀態快捷入口與 Excel 批次建立帳號 */
.stat-link{appearance:none;width:100%;text-align:left;font:inherit;color:inherit;cursor:pointer;border:1px solid var(--border);transition:.18s ease}.stat-link:hover{transform:translateY(-2px);border-color:#a9bfce;box-shadow:0 10px 24px rgba(23,54,79,.10)}.stat-link small{display:block;margin-top:7px;color:#477198;font-size:12px;font-weight:600}.filter-row-three{grid-template-columns:2fr 1fr 1fr}.account-import-card{padding:0 22px 22px;margin-bottom:18px}.import-toolbar{display:flex;gap:9px;align-items:center;flex-wrap:wrap;padding:0 0 16px}.file-btn{display:inline-flex;align-items:center;padding:9px 12px;border:1px solid var(--border);border-radius:10px;background:#fff;color:#173955;font-weight:700;cursor:pointer}.file-btn:hover{background:#f4f8fb}.import-summary{display:flex;align-items:center;gap:14px;padding:12px 0;font-size:14px}.import-ok{color:#287158;font-weight:700}.import-bad{color:#b64b4b;font-weight:700}.import-table-wrap{max-height:390px;overflow:auto;border:1px solid var(--border);border-radius:12px}.import-table{min-width:900px}.import-table th,.import-table td{padding:9px 10px;font-size:13px}.import-row-error{background:#fff5f5}.import-error-text{color:#b33f3f;font-weight:600}.import-success-text{color:#287158;font-weight:600}.import-empty{padding:24px}.primary-btn:disabled{opacity:.48;cursor:not-allowed}
@media(max-width:760px){.filter-row-three{grid-template-columns:1fr}.import-toolbar>*{flex:1 1 150px}.import-summary{align-items:flex-start;flex-direction:column;gap:5px}}

/* v13: keep login slogan wording together + editable image deletion */
.keep-together{white-space:nowrap;display:inline-block}
.editable-images{margin-top:14px}
.editable-image-item{position:relative;min-width:0;background:#f4f6f7;border-radius:14px;border:1px solid var(--border);overflow:hidden}
.editable-image-item img{border:0;border-radius:0;background:transparent;height:100%}
.image-delete-btn{position:absolute;right:10px;top:10px;border:0;border-radius:999px;padding:8px 12px;background:rgba(255,255,255,.95);color:var(--danger);font-weight:700;box-shadow:0 4px 14px rgba(15,43,70,.15)}
.image-delete-btn:hover{background:#fff1f1}
.image-delete-btn:disabled{opacity:.65;cursor:wait}
.image-empty{margin-top:12px;padding:16px;border:1px dashed var(--border);border-radius:12px;color:var(--muted)}