:root {
  --ink: #18211d;
  --muted: #68736e;
  --line: #dce3df;
  --line-strong: #c6d0ca;
  --canvas: #eff2f0;
  --surface: #ffffff;
  --surface-soft: #f6f8f6;
  --primary: #226b55;
  --primary-strong: #174c3d;
  --primary-soft: #e4f0eb;
  --blue: #3f708f;
  --blue-soft: #e7f0f6;
  --amber: #9b6a16;
  --amber-soft: #faf0d6;
  --red: #a3483d;
  --sidebar: #17251f;
  --shadow: 0 18px 50px rgba(19, 38, 29, .15);
  color: var(--ink);
  background: var(--canvas);
  font-family: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body { background: var(--canvas); }
button, input, textarea, select { font: inherit; letter-spacing: 0; }
button { cursor: pointer; }
a { color: var(--primary); }
svg { width: 18px; height: 18px; stroke-width: 1.8; }

.app-shell { min-height: 100vh; display: grid; grid-template-columns: 236px minmax(0, 1fr); }
.sidebar { position: sticky; top: 0; z-index: 20; height: 100vh; display: flex; flex-direction: column; overflow-y: auto; padding: 22px 14px 15px; color: #dbe5e0; background: var(--sidebar); }
.brand { display: flex; align-items: center; gap: 11px; padding: 0 8px 23px; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.22); background: #f3f6f4; color: var(--primary-strong); font-family: Georgia, serif; font-size: 20px; font-weight: 700; }
.brand > span:last-child { display: grid; gap: 2px; }
.brand strong { color: #fff; font-size: 16px; }
.brand small { color: #94a69d; font-size: 11px; }
.main-nav { display: grid; gap: 3px; }
.nav-button { min-height: 42px; width: 100%; display: flex; align-items: center; gap: 11px; border: 0; border-radius: 6px; padding: 0 11px; color: #acbcb4; background: transparent; text-align: left; }
.nav-button:hover { color: #fff; background: rgba(255,255,255,.06); }
.nav-button.active { color: #fff; background: #294239; }
.nav-button span { flex: 1; }
.nav-button em { min-width: 21px; height: 19px; display: grid; place-items: center; border-radius: 10px; padding: 0 6px; color: #d5e4dc; background: rgba(255,255,255,.1); font-size: 10px; font-style: normal; }
.sidebar-section { margin-top: 24px; border-top: 1px solid rgba(255,255,255,.09); padding-top: 14px; }
.sidebar-label { display: flex; align-items: center; justify-content: space-between; padding: 0 7px 7px 11px; color: #81958a; font-size: 10px; font-weight: 800; text-transform: uppercase; }
.library-shortcuts { display: grid; gap: 2px; }
.library-shortcut { min-height: 36px; display: flex; align-items: center; gap: 9px; border: 0; border-radius: 5px; padding: 0 11px; overflow: hidden; color: #aebdb6; background: transparent; text-align: left; }
.library-shortcut:hover, .library-shortcut.active { color: #fff; background: rgba(255,255,255,.055); }
.library-shortcut span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.library-dot { width: 8px; height: 8px; flex: 0 0 auto; border-radius: 2px; background: var(--dot); }
.sidebar-footer { margin-top: auto; padding-top: 18px; }
.sidebar-footer p { display: flex; align-items: center; gap: 7px; margin: 10px 11px 0; color: #7f9188; font-size: 10px; }
.sidebar-footer p span { width: 7px; height: 7px; border-radius: 50%; background: #61b887; box-shadow: 0 0 0 3px rgba(97,184,135,.12); }

.main-content { min-width: 0; }
.topbar { position: sticky; top: 0; z-index: 12; height: 72px; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--line); padding: 0 32px; background: rgba(255,255,255,.96); }
.global-search { flex: 1; max-width: 640px; height: 40px; display: flex; align-items: center; gap: 9px; border: 1px solid var(--line); border-radius: 6px; padding: 0 11px; background: var(--surface-soft); }
.global-search svg { color: var(--muted); }
.global-search input { min-width: 0; flex: 1; border: 0; outline: 0; color: var(--ink); background: transparent; }
.global-search kbd { border: 1px solid var(--line-strong); border-bottom-width: 2px; border-radius: 4px; padding: 2px 6px; color: var(--muted); background: #fff; font-size: 10px; }
.account-chip { max-width: 240px; min-height: 38px; display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 6px; padding: 0 11px; color: var(--muted); background: #fff; font-size: 12px; }
.account-chip span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-chip svg { flex: 0 0 auto; color: var(--primary); }
.route { display: none; max-width: 1280px; margin: 0 auto; padding: 34px 38px 56px; }
.route.active { display: block; }
#route-workspace.active { max-width: none; height: calc(100vh - 72px); padding: 0; }

.primary-button, .secondary-button, .text-button, .danger-button { min-height: 38px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; border-radius: 6px; padding: 0 14px; font-weight: 650; }
.primary-button, .secondary-button, .text-button, .danger-button, .icon-button { text-decoration: none; }
.primary-button { border: 1px solid var(--primary); color: #fff; background: var(--primary); }
.primary-button:hover { background: var(--primary-strong); }
.secondary-button { border: 1px solid var(--line-strong); color: var(--ink); background: #fff; }
.secondary-button:hover { border-color: #a7b5ad; background: var(--surface-soft); }
.text-button { border: 0; color: var(--primary); background: transparent; }
.danger-button { border: 1px solid #ddb7b2; color: var(--red); background: #fff; }
.icon-button { width: 38px; height: 38px; display: inline-grid; place-items: center; border: 1px solid var(--line); border-radius: 6px; padding: 0; color: var(--muted); background: #fff; }
.icon-button:hover { color: var(--ink); border-color: var(--line-strong); }
.icon-button.ghost { border-color: transparent; color: #91a49a; background: transparent; }
.icon-button.small { width: 28px; height: 28px; }
.mobile-menu { display: none; }

.page-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 25px; }
.page-heading h1 { margin: 4px 0 0; font-family: Georgia, "Microsoft YaHei", serif; font-size: 30px; line-height: 1.2; }
.page-heading p { max-width: 700px; margin: 7px 0 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.eyebrow { display: block; color: var(--primary); font-size: 10px; font-weight: 800; }
.button-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); background: var(--surface); }
.metric { min-height: 98px; border-right: 1px solid var(--line); padding: 18px 20px; }
.metric:last-child { border-right: 0; }
.metric span { display: block; color: var(--muted); font-size: 11px; }
.metric strong { display: block; margin: 8px 0 2px; font-family: Georgia, serif; font-size: 28px; }
.metric small { color: var(--muted); font-size: 10px; }

.overview-layout { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(280px, .75fr); gap: 26px; margin-top: 28px; }
.section-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.section-header h2 { margin: 0; font-size: 17px; }
.section-header span { color: var(--muted); font-size: 11px; }
.featured-library { min-height: 244px; display: grid; grid-template-columns: minmax(0, 1fr) 250px; border: 1px solid var(--line); border-left: 5px solid var(--library-color); border-radius: 7px; overflow: hidden; background: #fff; }
.featured-copy { display: flex; flex-direction: column; align-items: flex-start; padding: 30px; }
.featured-copy h2 { margin: 18px 0 8px; font-family: Georgia, "Microsoft YaHei", serif; font-size: 25px; }
.featured-copy p { max-width: 600px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.featured-copy .button-row { margin-top: auto; padding-top: 22px; }
.featured-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; border-left: 1px solid var(--line); background: var(--line); }
.material-cell { min-width: 0; display: grid; place-content: center; gap: 4px; padding: 14px; background: var(--surface-soft); text-align: center; }
.material-cell strong { font-family: Georgia, serif; font-size: 24px; }
.material-cell span { color: var(--muted); font-size: 10px; }

.activity-list { border-top: 1px solid var(--line); }
.activity-item { display: grid; grid-template-columns: 8px minmax(0, 1fr); gap: 11px; border-bottom: 1px solid var(--line); padding: 14px 2px; }
.activity-item > span { width: 7px; height: 7px; margin-top: 5px; border-radius: 50%; background: var(--blue); }
.activity-item strong { display: block; font-size: 12px; }
.activity-item small { display: block; margin-top: 3px; color: var(--muted); font-size: 10px; line-height: 1.5; }

.library-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.library-card { min-height: 202px; position: relative; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 7px; padding: 21px; overflow: hidden; background: #fff; }
.library-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--library-color); }
.library-card:hover { border-color: var(--line-strong); box-shadow: 0 7px 22px rgba(20,35,28,.06); }
.library-card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.library-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 6px; color: var(--library-color); background: color-mix(in srgb, var(--library-color) 11%, white); }
.status-badge, .type-badge { display: inline-flex; align-items: center; min-height: 23px; border-radius: 4px; padding: 2px 7px; font-size: 10px; font-weight: 700; }
.status-badge { color: var(--primary); background: var(--primary-soft); }
.type-badge { color: var(--blue); background: var(--blue-soft); }
.library-card h2 { margin: 18px 0 7px; font-size: 18px; }
.library-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.library-card-footer { display: flex; align-items: flex-end; justify-content: space-between; gap: 10px; margin-top: auto; padding-top: 20px; }
.library-card-footer span { color: var(--muted); font-size: 10px; }
.library-card-footer strong { display: block; margin-bottom: 2px; color: var(--ink); font-size: 13px; }

.detail-banner { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 24px; border-left: 5px solid var(--library-color); padding: 12px 0 12px 24px; margin-bottom: 24px; }
.detail-banner h1 { margin: 5px 0 8px; font-family: Georgia, "Microsoft YaHei", serif; font-size: 31px; }
.detail-banner p { max-width: 730px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.content-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 22px; }
.content-tab { min-height: 40px; border: 0; border-bottom: 2px solid transparent; padding: 0 14px; color: var(--muted); background: transparent; }
.content-tab.active { border-color: var(--primary); color: var(--ink); font-weight: 700; }
.library-summary { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, .55fr); gap: 24px; }
.structure-list, .source-list, .inbox-list { border-top: 1px solid var(--line); background: #fff; }
.structure-row, .source-row, .inbox-row { display: grid; grid-template-columns: 34px minmax(0, 1fr) auto; align-items: center; gap: 13px; border-bottom: 1px solid var(--line); padding: 14px 16px; }
.row-icon { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 5px; color: var(--primary); background: var(--primary-soft); }
.row-main { min-width: 0; }
.row-main strong { display: block; overflow-wrap: anywhere; font-size: 13px; }
.row-main small { display: block; margin-top: 3px; color: var(--muted); font-size: 10px; line-height: 1.5; }
.row-meta { color: var(--muted); font-size: 11px; text-align: right; }
.callout { border-left: 4px solid var(--amber); padding: 18px 20px; background: var(--amber-soft); }
.callout h3 { margin: 0 0 6px; font-size: 14px; }
.callout p { margin: 0; color: #735f38; font-size: 11px; line-height: 1.65; }

.workspace-shell { height: 100%; display: grid; grid-template-rows: 52px minmax(0, 1fr); background: #fff; }
.workspace-toolbar { display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--line); padding: 0 14px; background: #fff; }
.workspace-toolbar strong { min-width: 0; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workspace-toolbar span { color: var(--muted); font-size: 10px; }
.workspace-frame { width: 100%; height: 100%; border: 0; background: #fff; }
.workspace-loading { height: 100%; display: grid; place-items: center; color: var(--muted); }

.empty-state { min-height: 240px; display: grid; place-items: center; padding: 40px 24px; background: #fff; text-align: center; }
.empty-state svg { width: 38px; height: 38px; margin-bottom: 12px; color: var(--muted); }
.empty-state h2, .empty-state h3 { margin: 0 0 7px; }
.empty-state p { max-width: 520px; margin: 0 0 18px; color: var(--muted); line-height: 1.6; }

.settings-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 26px; }
.settings-nav { display: grid; align-content: start; gap: 3px; }
.settings-nav button { min-height: 39px; border: 0; border-left: 3px solid transparent; padding: 0 12px; color: var(--muted); background: transparent; text-align: left; }
.settings-nav button.active { border-color: var(--primary); color: var(--ink); background: var(--primary-soft); }
.settings-panel { border-top: 1px solid var(--line); background: #fff; }
.setting-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 20px; border-bottom: 1px solid var(--line); padding: 18px 20px; }
.setting-row strong, .setting-row small { display: block; }
.setting-row small { margin-top: 4px; color: var(--muted); line-height: 1.5; }

.modal { width: min(590px, calc(100vw - 32px)); max-height: calc(100vh - 32px); border: 0; border-radius: 8px; padding: 0; color: var(--ink); background: #fff; box-shadow: var(--shadow); }
.modal::backdrop { background: rgba(13,27,21,.58); backdrop-filter: blur(2px); }
.modal-header { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; border-bottom: 1px solid var(--line); padding: 14px 20px; }
.modal-header h2 { margin: 3px 0 0; font-size: 20px; }
.modal-body { max-height: calc(100vh - 180px); overflow-y: auto; padding: 20px; }
.modal-footer { min-height: 66px; display: flex; align-items: center; justify-content: flex-end; gap: 8px; border-top: 1px solid var(--line); padding: 12px 20px; }
.member-list { display: grid; gap: 8px; margin-bottom: 18px; }
.member-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 8px; border: 1px solid var(--line); padding: 10px 12px; background: var(--surface-soft); }
.member-row strong, .member-row small { display: block; }
.member-row strong { font-size: 12px; }
.member-row small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.member-row select { min-height: 32px; border: 1px solid var(--line); border-radius: 5px; padding: 0 7px; color: var(--ink); background: #fff; }
.member-invite-form { display: grid; grid-template-columns: minmax(0, 1fr) 112px auto; align-items: end; gap: 8px; border-top: 1px solid var(--line); padding-top: 18px; }
.member-invite-form label { display: grid; gap: 6px; color: var(--muted); font-size: 11px; font-weight: 650; }
.member-invite-form input, .member-invite-form select { width: 100%; min-height: 38px; border: 1px solid var(--line); border-radius: 6px; padding: 0 10px; color: var(--ink); background: #fff; }
.member-invite-form input:focus, .member-invite-form select:focus { border-color: var(--primary); outline: 0; box-shadow: 0 0 0 3px var(--primary-soft); }
.field-note { margin: 14px 0 0; color: var(--muted); font-size: 11px; line-height: 1.6; }
.invitation-panel { margin-bottom: 22px; padding: 0 20px; }
.invitation-panel .section-header { min-height: 54px; margin: 0; }
.invitation-panel .setting-row { margin: 0 -20px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid label { display: grid; gap: 6px; color: var(--muted); font-size: 11px; font-weight: 650; }
.form-grid label.full { grid-column: 1 / -1; }
.form-grid input, .form-grid textarea, .form-grid select { width: 100%; border: 1px solid var(--line); border-radius: 6px; padding: 10px 11px; outline: 0; color: var(--ink); background: #fff; resize: vertical; }
.form-grid input[type="color"] { height: 42px; padding: 4px; }
.form-grid input:focus, .form-grid textarea:focus, .form-grid select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.toast-region { position: fixed; right: 18px; bottom: 18px; z-index: 100; display: grid; gap: 8px; }
.toast { max-width: 350px; border-left: 4px solid var(--primary); border-radius: 5px; padding: 12px 15px; color: #fff; background: #26372f; box-shadow: var(--shadow); font-size: 12px; }

@media (max-width: 1040px) {
  .overview-layout { grid-template-columns: 1fr; }
  .library-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .library-summary { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .app-shell { display: block; }
  .sidebar { position: fixed; left: 0; top: 0; width: 250px; transform: translateX(-100%); transition: transform .2s ease; box-shadow: var(--shadow); }
  .sidebar.open { transform: translateX(0); }
  .mobile-scrim { position: fixed; inset: 0; z-index: 15; background: rgba(9,20,15,.45); }
  .mobile-menu { display: inline-grid; }
  .topbar { height: 64px; padding: 0 14px; }
  .account-chip { width: 38px; padding: 0; justify-content: center; }
  .account-chip span { display: none; }
  .topbar > .secondary-button { width: 38px; padding: 0; font-size: 0; }
  .global-search kbd { display: none; }
  .route { padding: 24px 16px 42px; }
  #route-workspace.active { height: calc(100vh - 64px); }
  .page-heading, .detail-banner { align-items: flex-start; grid-template-columns: 1fr; flex-direction: column; }
  .page-heading h1, .detail-banner h1 { font-size: 25px; }
  .metric-strip { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .featured-library { grid-template-columns: 1fr; }
  .featured-visual { min-height: 180px; border-top: 1px solid var(--line); border-left: 0; }
  .library-grid { grid-template-columns: 1fr; }
  .settings-layout { grid-template-columns: 1fr; }
  .settings-nav { grid-template-columns: repeat(2, 1fr); }
  .setting-row { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .member-invite-form { grid-template-columns: 1fr 1fr; }
  .member-invite-form button { grid-column: 1 / -1; }
  .form-grid label.full { grid-column: auto; }
  .modal { width: 100vw; max-width: none; height: 100vh; max-height: 100vh; border-radius: 0; }
  .workspace-toolbar span { display: none; }
}

@media (max-width: 430px) {
  .global-search { min-width: 0; }
  .metric { min-height: 88px; padding: 15px; }
  .metric strong { font-size: 24px; }
  .featured-copy { padding: 23px; }
}
 .auth-gate[hidden], .app-shell[hidden] { display: none; }

.auth-gate {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--paper, #f4f5f1);
}

.auth-panel {
  width: min(100%, 420px);
  padding: 32px;
  background: #fff;
  border: 1px solid var(--line, #d8ddd8);
  box-shadow: 0 18px 50px rgba(33, 49, 43, .08);
}

.auth-brand { margin-bottom: 36px; }
.auth-form h1 { margin: 0 0 8px; font-size: 28px; }
.auth-form p { margin: 0 0 24px; color: var(--muted, #68736d); line-height: 1.6; }
.auth-form label { display: grid; gap: 7px; margin: 16px 0; font-weight: 650; }
.auth-form input { width: 100%; box-sizing: border-box; }
.auth-form button { width: 100%; margin-top: 12px; justify-content: center; }
.auth-message { min-height: 22px; margin-bottom: 10px; color: var(--green, #28705a); line-height: 1.5; }
.auth-message.danger { color: var(--red, #b54747); }