:root {
  --ink: #3D3229;
  --muted: #8A7D6E;
  --accent: #A67B4F;
  --accent-dark: #7F5C39;
  --accent-soft: #F0EAE0;
  --paper: #FFFFFF;
  --canvas: #FBFAF8;
  --line: #E8DED1;
  --warm: #C0724F;
  --danger: #B54A4A;
  --danger-soft: #FFF1F0;
  --shadow: 0 10px 32px rgba(61, 50, 41, 0.055);
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--canvas); font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 14px; }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled, select:disabled, input:disabled { cursor: not-allowed; opacity: .55; }
.hidden { display: none !important; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 8px; font-size: 30px; letter-spacing: -.5px; }
h2 { margin-bottom: 8px; font-size: 19px; }
p { line-height: 1.65; }
label { display: flex; flex-direction: column; gap: 7px; color: #8A7D6E; font-size: 12px; font-weight: 600; }
input, select { width: 100%; min-height: 40px; padding: 9px 11px; border: 1px solid #D8C6AC; border-radius: 8px; outline: none; background: #fff; color: var(--ink); transition: border-color .15s, box-shadow .15s; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(166, 123, 79, .12); }
input[type="checkbox"] { width: 17px; min-height: 17px; accent-color: var(--accent); }

.brand-mark { width: 58px; height: 58px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.4); border-radius: 17px; background: rgba(255,255,255,.12); color: #fff; font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif; font-size: 30px; }
.brand-mark.small { width: 39px; height: 39px; border: 0; border-radius: 12px; background: linear-gradient(135deg, #A67B4F, #C9A06A); color: #fff; font-size: 22px; box-shadow: 0 5px 14px rgba(166, 123, 79, .2); }
.eyebrow { margin-bottom: 7px; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; }
.eyebrow.accent { color: var(--accent); }
.muted { color: var(--muted); }

.auth-layout { min-height: 100vh; display: grid; grid-template-columns: minmax(420px, 1.1fr) minmax(480px, .9fr); background: var(--paper); }
.auth-intro { display: flex; flex-direction: column; justify-content: center; padding: 8vw; color: #fff; background: radial-gradient(circle at 75% 20%, rgba(255,255,255,.13), transparent 30%), linear-gradient(145deg, #3D3229, #96733D); }
.auth-intro .eyebrow { margin-top: 34px; color: #D8C6AC; }
.auth-intro h1 { margin: 8px 0 24px; font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif; font-size: clamp(42px, 5vw, 68px); font-weight: 500; line-height: 1.25; letter-spacing: 1px; }
.auth-description { max-width: 520px; color: #F0EAE0; font-size: 16px; line-height: 1.9; }
.auth-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.auth-points span { padding: 8px 13px; border: 1px solid rgba(255,255,255,.2); border-radius: 30px; color: #FBFAF8; font-size: 12px; }
.auth-panel { display: grid; place-items: center; padding: 50px; }
.auth-form { width: min(100%, 470px); }
.auth-form h2 { margin-bottom: 10px; font-size: 29px; }
.form-description { margin-bottom: 30px; color: var(--muted); }
.auth-form label { margin-bottom: 17px; font-size: 13px; }
.auth-form input, .auth-form select { min-height: 46px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.check-label { flex-direction: row !important; align-items: center; align-self: end; min-height: 46px; padding-bottom: 10px; }

.forgot-link { display: block; margin: 15px auto 0; padding: 5px; border: 0; background: transparent; color: var(--accent-dark); font-size: 12px; }
.forgot-link:hover { text-decoration: underline; }

.primary-btn, .secondary-btn, .danger-btn { min-height: 42px; padding: 10px 19px; border-radius: 8px; font-weight: 650; transition: background .15s, transform .15s; }
.primary-btn { border: 1px solid var(--accent); background: var(--accent); color: #fff; }
.primary-btn:hover { background: var(--accent-dark); }
.primary-btn:active, .secondary-btn:active { transform: translateY(1px); }
.primary-btn.compact, .secondary-btn.compact { width: auto; min-height: 38px; padding: 8px 15px; }
.secondary-btn { border: 1px solid #D8C6AC; background: #fff; color: var(--accent-dark); }
.secondary-btn:hover { background: var(--accent-soft); }
.danger-btn { border: 1px solid #e6c7c4; background: #fff; color: var(--danger); }
.text-btn { padding: 5px; border: 0; background: none; color: #8A7D6E; }
.text-btn:hover { color: var(--accent-dark); }

.app-layout { min-height: 100vh; display: grid; grid-template-columns: 226px minmax(0, 1fr); }
.sidebar { position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; padding: 26px 17px 18px; border-right: 1px solid var(--line); background: #FBFAF8; color: var(--ink); }
.sidebar-brand { display: flex; align-items: center; gap: 12px; padding: 0 8px 30px; }
.sidebar-brand strong { display: block; font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif; font-size: 22px; letter-spacing: 2px; }
.sidebar-brand span { display: block; margin-top: 3px; color: #8A7D6E; font-size: 10px; letter-spacing: 1px; }
.main-nav { display: flex; flex-direction: column; gap: 7px; }
.nav-item { display: flex; align-items: center; gap: 11px; width: 100%; padding: 12px; border: 0; border-radius: 10px; background: transparent; color: #8A7D6E; text-align: left; }
.nav-item:hover { background: #F0EAE0; color: var(--ink); }
.nav-item.active { background: #F0EAE0; color: var(--accent-dark); font-weight: 700; }
.nav-icon { width: 25px; height: 25px; display: grid; place-items: center; border: 1px solid currentColor; border-radius: 7px; font-size: 11px; opacity: .8; }
.count-badge { min-width: 20px; margin-left: auto; padding: 2px 6px; border-radius: 20px; background: #b54a4a; color: #fff; font-size: 10px; text-align: center; }
.sidebar-footer { display: flex; align-items: center; gap: 9px; margin-top: auto; padding: 16px 5px 0; border-top: 1px solid var(--line); }
.user-avatar { width: 34px; height: 34px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; background: linear-gradient(135deg, #A67B4F, #C9A06A); color: #fff; }
.sidebar-user { min-width: 0; flex: 1; }
.sidebar-user strong, .sidebar-user span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-user strong { font-size: 12px; }
.sidebar-user span { margin-top: 3px; color: #8A7D6E; font-size: 10px; }

.workspace { min-width: 0; padding: 34px 38px 50px; }
.workspace-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 27px; }
.workspace-header p { margin-bottom: 0; color: var(--muted); }
.today-chip { padding: 10px 15px; border: 1px solid var(--line); border-radius: 9px; background: #fff; color: var(--muted); font-size: 12px; }

.trial-banner { margin-bottom: 20px; padding: 12px 18px; border: 1px solid #E3D2B2; border-radius: 11px; background: linear-gradient(120deg, #FBF6EB, #F7EEDD); color: #7A6444; font-size: 12.5px; line-height: 1.7; }
.trial-banner strong { color: #96733D; }
.trial-banner a { color: #96733D; font-weight: 700; }
.trial-banner.warning { border-color: #E5C69A; background: linear-gradient(120deg, #FDF3E3, #FAEBD4); color: #8A5A2B; }
.trial-banner.warning strong { color: #B97F35; }
.trial-banner.expired { border-color: #D9B3A0; background: linear-gradient(120deg, #FBEBE4, #F7E0D6); color: #8F4A2E; }
.trial-banner.expired strong, .trial-banner.expired a { color: #B5542D; }
.trial-entry-btn { margin-top: 10px; background: linear-gradient(120deg, #C9A06A, #B08A52); }

.view-section { display: flex; flex-direction: column; gap: 20px; }
.card { padding: 23px; border: 1px solid var(--line); border-radius: 13px; background: var(--paper); box-shadow: var(--shadow); }
.card h2 { margin-bottom: 6px; }
.card p { margin-bottom: 0; color: var(--muted); font-size: 12px; }
.generate-card { display: grid; grid-template-columns: minmax(250px, .8fr) minmax(530px, 1.2fr); align-items: end; gap: 28px; }
.generate-controls { display: grid; grid-template-columns: 1fr 1fr .75fr auto; align-items: end; gap: 12px; }
.card-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.schedule-picker { display: flex; align-items: flex-end; gap: 12px; }
.schedule-picker label { min-width: 320px; }
.toolbar-actions { display: flex; gap: 8px; }
.status-badge { display: inline-flex; align-items: center; width: max-content; min-height: 25px; padding: 4px 9px; border-radius: 20px; background: #E8DED1; color: var(--muted); font-size: 11px; font-weight: 700; }
.status-badge.draft, .status-badge.pending { background: #fff5e8; color: #a36a25; }
.status-badge.published, .status-badge.approved { background: var(--accent-soft); color: var(--accent-dark); }
.status-badge.rejected { background: var(--danger-soft); color: var(--danger); }

.schedule-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.meta-item { padding: 10px 13px; border-radius: 8px; background: #F8F5F1; color: var(--muted); font-size: 12px; }
.meta-item strong { margin-left: 5px; color: var(--ink); }
.conflict-panel { margin-bottom: 18px; padding: 15px; border: 1px solid #ecd4c7; border-radius: 9px; background: #fff9f5; }
.conflict-panel.success { border-color: #d4e8e2; background: #f2faf7; }
.conflict-panel h3 { margin-bottom: 8px; font-size: 13px; }
.conflict-panel ul { max-height: 130px; overflow: auto; margin: 0; padding-left: 20px; color: #9a5a42; font-size: 12px; line-height: 1.8; }
.conflict-panel.success p { color: var(--accent); }
.schedule-grid { min-width: 850px; border-collapse: separate; border-spacing: 0; font-size: 12px; }
.schedule-grid th, .schedule-grid td { padding: 8px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: center; }
.schedule-grid tr:first-child th { border-top: 1px solid var(--line); }
.schedule-grid th:first-child, .schedule-grid td:first-child { position: sticky; left: 0; z-index: 2; border-left: 1px solid var(--line); background: #fff; text-align: left; }
.schedule-grid tr:first-child th { background: #F5F1EB; color: #8A7D6E; font-weight: 650; }
.schedule-grid tr:first-child th:first-child { z-index: 3; }
.schedule-grid .weekend { background: #fbf8f2; }
.schedule-grid td select { min-width: 75px; min-height: 32px; padding: 5px 7px; border-color: transparent; background: #F5F1EB; font-size: 12px; }
.schedule-grid td select.shift-assigned { border-color: #c5dfd8; background: var(--accent-soft); color: var(--accent-dark); font-weight: 700; }
.schedule-grid td select.night-assigned { border-color: #d8d0e7; background: #f3f0f9; color: #665384; }
.staff-cell { min-width: 145px; }
.staff-cell strong { display: block; font-size: 13px; }
.staff-cell span { display: block; margin-top: 4px; color: var(--muted); font-size: 10px; }
.shift-pill { display: inline-block; min-width: 42px; padding: 5px 8px; border-radius: 6px; background: #f0f3f2; color: #778589; }
.shift-pill.assigned { background: var(--accent-soft); color: var(--accent-dark); font-weight: 700; }
.shift-pill.night { background: #f3f0f9; color: #665384; }
.empty-state { padding: 55px 20px; text-align: center; color: var(--muted); }
.empty-state strong { display: block; margin-bottom: 8px; color: var(--ink); font-size: 16px; }

.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.section-heading h2 { margin-bottom: 5px; }
.staff-form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin-bottom: 17px; }
.staff-form-grid .check-label { align-self: end; }
.request-form-grid { display: grid; grid-template-columns: 1fr 1fr 1.3fr 1.5fr auto; align-items: end; gap: 13px; }
.form-actions { display: flex; justify-content: space-between; margin-top: 18px; }
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.data-table th { padding: 11px 10px; border-bottom: 1px solid var(--line); background: #F8F5F1; color: var(--muted); text-align: left; white-space: nowrap; }
.data-table td { padding: 11px 10px; border-bottom: 1px solid #E8DED1; vertical-align: middle; }
.data-table tr:last-child td { border-bottom: 0; }
.data-table input, .data-table select { min-width: 80px; min-height: 34px; padding: 6px 8px; }
.data-table input[type="checkbox"] { min-width: 17px; }
.data-table .name-cell { min-width: 100px; font-weight: 700; }
.data-table .note-cell { max-width: 260px; color: var(--muted); }
.row-actions { display: flex; gap: 6px; white-space: nowrap; }
.segmented-tabs { display: inline-flex; gap: 4px; margin-bottom: 20px; padding: 4px; border-radius: 9px; background: #F0EAE0; }
.segmented-tabs button { padding: 8px 18px; border: 0; border-radius: 7px; background: transparent; color: var(--muted); }
.segmented-tabs button.active { background: #fff; color: var(--accent-dark); box-shadow: 0 2px 8px rgba(61,50,41,.08); font-weight: 700; }
.invite-card { border-color: #D8C6AC; background: linear-gradient(135deg, #FFFFFF, #FBFAF8); }
.invite-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 4px 0 20px; }
.invite-steps span { display: flex; align-items: center; gap: 9px; padding: 12px; border-radius: 10px; background: #F0EAE0; color: #6F5B45; font-size: 12px; }
.invite-steps b { width: 23px; height: 23px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; background: #FFFFFF; color: var(--accent-dark); }
.invite-result { margin: 16px 0; padding: 16px; border: 1px solid #D8C6AC; border-radius: 10px; background: #FFFFFF; }
.copy-row { display: flex; gap: 9px; }
.copy-row input { flex: 1; color: var(--accent-dark); }
.copy-row button { flex: 0 0 auto; }
.invite-footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.invite-footer p { margin: 0; }
.form-footnote { margin: 10px 0 0 !important; color: var(--muted); font-size: 11px !important; }
.local-note { margin: 14px 0 0 !important; padding: 10px 12px; border-radius: 8px; background: #FFF5E8; color: #96733D !important; }
#join-department { margin-left: 8px; }

.metrics-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.metric-card { padding: 17px 18px; border: 1px solid var(--line); border-radius: 11px; background: var(--paper); }
.metric-card span { display: block; color: var(--muted); font-size: 11px; }
.metric-card strong { display: block; margin-top: 7px; color: var(--ink); font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", serif; font-size: 24px; font-weight: 600; }
.statistics-table { margin: 4px 0 18px; }
.statistics-highlight { padding: 12px 14px; border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; background: var(--accent-soft); color: var(--accent-dark); font-size: 12px; line-height: 1.7; }
.ai-analysis-result { margin: 18px 0; padding: 17px; border: 1px solid var(--line); border-radius: 10px; background: #FCFBF9; }
.ai-analysis-result h3 { margin: 0 0 9px; font-size: 14px; }
.ai-analysis-result p { color: var(--ink); font-size: 13px; }
.ai-analysis-result ul { margin: 7px 0 16px; padding-left: 20px; color: var(--muted); font-size: 12px; line-height: 1.85; }
.ai-model-note { margin-top: 12px !important; color: var(--muted) !important; font-size: 11px !important; }
.rules-details { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 15px; }
.rules-details summary { cursor: pointer; color: var(--accent-dark); font-size: 12px; font-weight: 700; }
.rules-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 16px; }
.rules-grid > div { padding: 15px; border-radius: 9px; background: #F8F5F1; }
.rules-grid strong { font-size: 12px; }
.rules-grid p { margin-top: 6px; font-size: 12px; }
.attendance-rules { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 0; }
.attendance-filter-grid { display: grid; grid-template-columns: 1fr 1fr 1.2fr auto auto; align-items: end; gap: 12px; }
.attendance-record-grid { display: grid; grid-template-columns: 1fr 1fr 1.3fr 1.3fr auto; align-items: end; gap: 12px; }
.demo-badge { display: inline-flex; margin-left: 5px; padding: 2px 6px; border-radius: 5px; background: var(--accent-soft); color: var(--accent-dark); font-size: 9px; font-weight: 700; vertical-align: middle; }
.warning-text { color: var(--danger); font-weight: 700; }

.toast { position: fixed; top: 22px; left: 50%; z-index: 100; max-width: 520px; padding: 12px 18px; border-radius: 9px; background: var(--ink); color: #fff; box-shadow: 0 10px 35px rgba(0,0,0,.18); opacity: 0; pointer-events: none; transform: translate(-50%, -12px); transition: .2s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { background: #954545; }

@media (max-width: 1180px) {
  .workspace { padding: 28px 24px 40px; }
  .generate-card { grid-template-columns: 1fr; align-items: start; }
  .request-form-grid { grid-template-columns: repeat(2, 1fr); }
  .staff-form-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .attendance-filter-grid, .attendance-record-grid { grid-template-columns: repeat(2, 1fr); }
  .rules-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .auth-layout { grid-template-columns: 1fr; }
  .auth-intro { padding: 45px 30px; }
  .auth-intro h1 { font-size: 40px; }
  .auth-panel { padding: 40px 25px; }
  .app-layout { grid-template-columns: 76px minmax(0, 1fr); }
  .sidebar { padding: 20px 10px; }
  .sidebar-brand { justify-content: center; padding: 0 0 25px; }
  .sidebar-brand > div:last-child, .nav-item > span:not(.nav-icon):not(.count-badge), .sidebar-user, .sidebar-footer .text-btn { display: none; }
  .nav-item { justify-content: center; padding: 10px; }
  .sidebar-footer { justify-content: center; }
  .workspace { padding: 24px 16px; }
  .generate-controls { grid-template-columns: 1fr 1fr; }
  .card-toolbar { align-items: flex-start; flex-direction: column; }
  .schedule-picker { width: 100%; }
  .schedule-picker label { min-width: 0; flex: 1; }
}