:root {
  --ow-bg: #eef5ff;
  --ow-surface: #ffffff;
  --ow-border: #e2e8f0;
  --ow-border-strong: #cbd5e1;
  --ow-text: #0f172a;
  --ow-muted: #64748b;
  --ow-cobalt: #2563eb;
  --ow-cobalt-hover: #1d4ed8;
  --ow-cobalt-soft: #eff6ff;
  --ow-user-bubble: #f1f5f9;
  --ow-bot-bubble: #ffffff;
  --ow-danger: #dc2626;
  --ow-warn: #d97706;
  --ow-ok: #059669;
  --ow-sidebar-w: 260px;
  --ow-sidebar-w-compact: 96px;
  --ow-mascot-w: min(380px, 32vw);
  --ow-radius: 14px;
  --ow-radius-lg: 18px;
  --ow-shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.04);
  --ow-font: "Inter", "Segoe UI", "PingFang HK", "Noto Sans HK", "Microsoft JhengHei", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--ow-font);
  color: var(--ow-text);
  background: var(--ow-bg);
}

a {
  color: var(--ow-cobalt);
}

button,
input,
select,
textarea {
  font: inherit;
}

.ow-logo-cube {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 55%, #1e40af 100%);
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.15), 0 4px 12px rgba(37, 99, 235, 0.35);
  transform: rotate(-8deg);
  flex-shrink: 0;
}

.ow-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  text-decoration: none;
  background: var(--ow-cobalt);
  color: #fff;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.ow-btn:hover {
  background: var(--ow-cobalt-hover);
}

.ow-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.ow-btn.secondary {
  background: var(--ow-surface);
  color: var(--ow-text);
  border-color: var(--ow-border-strong);
}

.ow-btn.secondary:hover {
  border-color: var(--ow-cobalt);
  background: var(--ow-cobalt-soft);
}

.ow-btn.ghost {
  background: transparent;
  color: var(--ow-muted);
  border-color: var(--ow-border);
}

.ow-btn.block {
  width: 100%;
}

.ow-icon-btn {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 10px;
  border: 1px solid var(--ow-border);
  background: var(--ow-surface);
  color: var(--ow-text);
  cursor: pointer;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.ow-icon-btn:hover {
  border-color: var(--ow-cobalt);
  color: var(--ow-cobalt);
}

.ow-icon-btn.active {
  background: var(--ow-cobalt-soft);
  border-color: var(--ow-cobalt);
  color: var(--ow-cobalt);
}

.ow-lang-toggle {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: #f1f5f9;
  border-radius: 12px;
  border: 1px solid var(--ow-border);
}

.ow-lang-toggle button {
  flex: 1;
  border: 0;
  background: transparent;
  border-radius: 9px;
  padding: 8px 6px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--ow-muted);
  cursor: pointer;
}

.ow-lang-toggle button.active {
  background: #fff;
  color: var(--ow-cobalt);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.ow-app {
  background: var(--ow-bg);
}

.ow-shell {
  display: grid;
  min-height: 100dvh;
  max-height: 100dvh;
  grid-template-columns: var(--ow-sidebar-w-compact) minmax(0, 1fr);
  grid-template-areas: "sidebar stage";
}

.ow-shell > .ow-sidebar {
  grid-area: sidebar;
}

.ow-sidebar {
  position: relative;
  width: auto;
  height: 100dvh;
  max-height: 100dvh;
  z-index: 30;
  background: var(--ow-surface);
  border-right: 1px solid var(--ow-border);
  display: flex;
  flex-direction: column;
  padding: 12px 8px;
  gap: 8px;
  overflow-y: auto;
  overflow-x: hidden;
}

.ow-app-stage {
  grid-area: stage;
  position: relative;
  min-width: 0;
  min-height: 0;
  max-height: 100dvh;
  height: 100dvh;
  overflow: hidden;
  background: var(--ow-bg);
}

.ow-stage-scene {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.ow-mascot-stage {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(180deg, #f8fbff 0%, #eef5ff 45%, #e8f0fe 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.ow-mascot-stage * {
  pointer-events: none;
}

.ow-chat-panel {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  pointer-events: none;
  background: transparent;
}

.ow-chat-overlay > * {
  pointer-events: auto;
}

.ow-nav-ico {
  flex-shrink: 0;
  font-size: 1.05rem;
  line-height: 1;
}

.ow-nav-label {
  line-height: 1.25;
}

.ow-nav-kbd {
  display: none;
}

.ow-shell .ow-sidebar .ow-btn.block {
  flex-direction: column;
  gap: 4px;
  padding: 10px 6px;
  font-size: 0.72rem;
}

.ow-shell .ow-sidebar .ow-nav button,
.ow-shell .ow-sidebar .ow-nav a.ow-nav-item {
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  padding: 10px 6px;
  font-size: 0.68rem;
}

.ow-shell .ow-sidebar .ow-brand {
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.ow-shell .ow-sidebar .ow-brand > div {
  display: none;
}

.ow-shell .ow-sidebar-foot .hint,
.ow-shell .ow-sidebar-foot label {
  display: none;
}

.ow-shell .ow-sidebar-foot .ow-lang-toggle {
  flex-direction: column;
  gap: 4px;
}

.ow-shell .ow-sidebar-foot .ow-lang-toggle button {
  font-size: 0.65rem;
  padding: 7px 4px;
}

.ow-lang-toggle--desktop {
  display: flex;
}

/* Mascot canvas fills the full stage — character renders centered in the scene */
.ow-mascot-stage #mascot-mount,
.ow-mascot-fallback-wrap,
.ow-mascot-r3f-host {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.ow-mascot-r3f-host,
.ow-mascot-r3f-host canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

.ow-mascot-r3f-host {
  transition: opacity 0.35s ease-out;
}

.ow-mascot-r3f-host--booting {
  opacity: 0 !important;
  pointer-events: none;
}

.ow-mascot-canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

.ow-mascot-fallback-quiet {
  /* WebGL failed: keep stage gradient only — no placeholder image */
}

.ow-brand {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.ow-brand h1 {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.25;
  word-break: break-all;
}

.ow-brand p {
  margin: 4px 0 0;
  font-size: 0.72rem;
  color: var(--ow-muted);
  line-height: 1.35;
}

.ow-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
}

.ow-nav button,
.ow-nav a.ow-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border-radius: 10px;
  border: 0;
  background: transparent;
  color: var(--ow-text);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
}

.ow-nav button:hover,
.ow-nav a.ow-nav-item:hover {
  background: #f1f5f9;
}

.ow-nav button.active {
  background: var(--ow-cobalt-soft);
  color: var(--ow-cobalt);
}

.ow-sidebar-foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--ow-border);
}

.ow-sidebar-foot label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--ow-muted);
  margin-bottom: 8px;
}

.ow-sidebar-foot .hint {
  font-size: 0.68rem;
  color: var(--ow-muted);
  margin: 8px 0 0;
  line-height: 1.35;
}

.ow-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.ow-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px 8px;
  border-bottom: 0;
  background: transparent;
  flex-shrink: 0;
  position: relative;
  z-index: 3;
}

.ow-chat-header .title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.ow-chat-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

.ow-chat-header .sub {
  margin: 2px 0 0;
  font-size: 0.78rem;
  color: var(--ow-muted);
}

.ow-messages {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: transparent;
  -webkit-overflow-scrolling: touch;
}

.ow-msg-row {
  display: flex;
  gap: 10px;
  max-width: 92%;
}

.ow-msg-row.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.ow-msg-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  overflow: hidden;
  background: transparent;
  border: 1px solid var(--ow-border);
}

.ow-msg-avatar.user-av {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.85rem;
}

.ow-msg-avatar canvas,
.ow-msg-avatar img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.ow-msg-bubble {
  padding: 12px 14px;
  border-radius: var(--ow-radius);
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.95rem;
}

.ow-msg-row.bot .ow-msg-bubble {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.06);
  backdrop-filter: blur(6px);
}

.ow-msg-row.user .ow-msg-bubble {
  background: rgba(241, 245, 249, 0.94);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.05);
  backdrop-filter: blur(6px);
}

.ow-msg-row.system .ow-msg-bubble,
.ow-msg-row.error .ow-msg-bubble {
  background: transparent;
  border: 0;
  color: var(--ow-muted);
  font-size: 0.85rem;
  text-align: center;
  width: 100%;
}

.ow-msg-row.error .ow-msg-bubble {
  color: var(--ow-danger);
}

.ow-msg-row.typing .ow-msg-bubble {
  opacity: 0.75;
  font-style: italic;
}

.ow-composer {
  padding: 10px 16px calc(8px + env(safe-area-inset-bottom, 0px));
  border-top: 0;
  background: transparent;
  flex-shrink: 0;
  position: relative;
  z-index: 4;
}

.ow-composer form {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 6px;
  border-radius: 999px;
  border: 1px solid rgba(203, 213, 225, 0.9);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(10px);
}

.ow-composer input[type="text"] {
  flex: 1;
  border: 1px solid var(--ow-border-strong);
  border-radius: 999px;
  padding: 12px 16px;
  font-size: 0.95rem;
  outline: none;
  min-width: 0;
  background: #fff;
}

.ow-composer input:focus {
  border-color: var(--ow-cobalt);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.ow-send-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 0;
  background: var(--ow-cobalt);
  color: #fff;
  cursor: pointer;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.ow-send-btn:hover {
  background: var(--ow-cobalt-hover);
}

.ow-mic-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 0;
  background: #f1f5f9;
  color: var(--ow-text);
  cursor: pointer;
  flex-shrink: 0;
}

.ow-mic-btn.recording {
  background: #fee2e2;
  color: var(--ow-danger);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

.ow-chat-footer {
  text-align: center;
  font-size: 0.72rem;
  color: var(--ow-muted);
  padding: 2px 16px 8px;
  background: transparent;
  flex-shrink: 0;
}

.ow-status-bar {
  text-align: center;
  font-size: 0.78rem;
  color: var(--ow-muted);
  padding: 2px 16px;
  min-height: 1.2em;
  background: transparent;
  flex-shrink: 0;
}

.ow-status-bar.listening {
  color: var(--ow-cobalt);
  font-weight: 600;
}

.ow-mascot-sparkles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.12), transparent 42%),
    radial-gradient(circle at 80% 70%, rgba(37, 99, 235, 0.08), transparent 48%);
}

.ow-history-drawer {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(360px, 92%);
  max-width: 100%;
  height: 100%;
  background: var(--ow-surface);
  border-right: 1px solid var(--ow-border);
  box-shadow: var(--ow-shadow);
  z-index: 40;
  transform: translateX(-105%);
  visibility: hidden;
  pointer-events: none;
  transition: transform 0.2s ease, visibility 0.2s;
  display: flex;
  flex-direction: column;
}

.ow-history-drawer.open {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}

.ow-history-drawer header {
  padding: 16px;
  border-bottom: 1px solid var(--ow-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ow-history-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.ow-history-item {
  border: 1px solid var(--ow-border);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
}

.ow-history-item .meta {
  font-size: 0.75rem;
  color: var(--ow-muted);
  margin-bottom: 6px;
}

.ow-history-item .preview {
  font-size: 0.85rem;
  line-height: 1.4;
  margin-bottom: 8px;
}

.ow-history-item .actions {
  display: flex;
  gap: 8px;
}

.ow-voice-panel {
  display: none;
  padding: 12px 20px;
  border-bottom: 0;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  gap: 12px;
  flex-direction: column;
  flex-shrink: 0;
}

.ow-voice-panel.open {
  display: flex;
}

.ow-voice-row {
  display: grid;
  grid-template-columns: 64px 1fr 52px;
  align-items: center;
  gap: 10px;
}

.ow-voice-row label {
  font-size: 0.78rem;
  color: var(--ow-muted);
  font-weight: 600;
}

.ow-voice-row .val {
  font-size: 0.78rem;
  color: var(--ow-cobalt);
  font-weight: 700;
  text-align: right;
}

.ow-voice-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ow-voice-presets button {
  border: 1px solid var(--ow-border);
  background: #fff;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.72rem;
  cursor: pointer;
}

.ow-voice-presets button.active,
.ow-voice-presets button:hover {
  border-color: var(--ow-cobalt);
  background: var(--ow-cobalt-soft);
}

/* Admin shell — do not inherit chat compact-sidebar grid-area rules */
.ow-admin-shell {
  display: grid;
  grid-template-columns: minmax(220px, var(--ow-sidebar-w)) minmax(0, 1fr);
  min-height: 100dvh;
  width: 100%;
}

.ow-admin-shell > .ow-sidebar {
  grid-column: 1;
  grid-row: 1;
  width: 100%;
  max-width: var(--ow-sidebar-w);
  height: 100dvh;
  padding: 20px 16px;
}

.ow-admin-shell .ow-sidebar .ow-brand {
  flex-direction: row;
  align-items: flex-start;
  text-align: left;
}

.ow-admin-shell .ow-sidebar .ow-brand > div {
  display: block;
}

.ow-admin-shell .ow-sidebar .ow-nav button,
.ow-admin-shell .ow-sidebar .ow-nav a.ow-nav-item {
  flex-direction: row;
  text-align: left;
  font-size: 0.9rem;
  padding: 10px 12px;
  gap: 10px;
}

.ow-admin-shell .ow-sidebar-foot label,
.ow-admin-shell .ow-sidebar-foot .hint {
  display: block;
}

.ow-admin-shell .ow-sidebar-foot .ow-lang-toggle {
  flex-direction: row;
}

.ow-admin-main {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  width: 100%;
  max-width: none;
  padding: 24px clamp(16px, 3vw, 32px);
  overflow-x: auto;
  background: var(--ow-bg);
}

.ow-admin-main .ow-table {
  min-width: 640px;
}

.ow-admin-main .ow-table td,
.ow-admin-main .ow-table th {
  white-space: nowrap;
}

.ow-admin-main .ow-table td.ow-wrap,
.ow-admin-main .ow-table th.ow-wrap {
  white-space: normal;
  word-break: break-word;
  max-width: 280px;
}

.ow-card {
  background: var(--ow-surface);
  border: 1px solid var(--ow-border);
  border-radius: var(--ow-radius-lg);
  padding: 16px 18px;
  margin-bottom: 14px;
  box-shadow: var(--ow-shadow);
}

.ow-card h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}

.ow-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.ow-stat {
  background: var(--ow-surface);
  border: 1px solid var(--ow-border);
  border-radius: 12px;
  padding: 14px;
}

.ow-stat .n {
  font-size: 1.5rem;
  font-weight: 700;
}

.ow-stat .l {
  color: var(--ow-muted);
  font-size: 0.85rem;
}

.ow-table-wrap {
  overflow-x: auto;
}

table.ow-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

table.ow-table th,
table.ow-table td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--ow-border);
  vertical-align: top;
}

table.ow-table th {
  color: var(--ow-muted);
  font-weight: 600;
}

.ow-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  background: #f1f5f9;
}

.ow-tag.on {
  background: #d1fae5;
  color: var(--ow-ok);
}

.ow-tag.off {
  background: #fee2e2;
  color: var(--ow-danger);
}

.ow-muted {
  color: var(--ow-muted);
}

.ow-err {
  color: var(--ow-danger);
}

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

.ow-warn {
  color: var(--ow-warn);
}

.ow-mono {
  font-family: ui-monospace, Menlo, monospace;
  font-size: 0.8rem;
  word-break: break-all;
}

.ow-auth-card {
  width: min(440px, 100%);
  background: var(--ow-surface);
  border: 1px solid var(--ow-border);
  border-radius: var(--ow-radius-lg);
  box-shadow: var(--ow-shadow);
  padding: 32px 28px;
}

@media (min-width: 1025px) {
  .ow-shell {
    grid-template-columns: var(--ow-sidebar-w) minmax(0, 1fr);
  }

  .ow-shell .ow-sidebar {
    padding: 20px 16px;
  }

  .ow-shell .ow-sidebar .ow-brand {
    flex-direction: row;
    align-items: flex-start;
    text-align: left;
  }

  .ow-shell .ow-sidebar .ow-brand > div {
    display: block;
  }

  .ow-shell .ow-sidebar .ow-btn.block {
    flex-direction: row;
    font-size: 0.92rem;
    padding: 10px 14px;
  }

  .ow-nav-kbd {
    display: inline;
    font-size: 0.75rem;
    margin-left: auto;
  }

  .ow-shell .ow-sidebar .ow-nav button,
  .ow-shell .ow-sidebar .ow-nav a.ow-nav-item {
    flex-direction: row;
    text-align: left;
    font-size: 0.9rem;
    padding: 10px 12px;
    gap: 10px;
  }

  .ow-shell .ow-sidebar-foot label,
  .ow-shell .ow-sidebar-foot .hint {
    display: flex;
  }

  .ow-shell .ow-sidebar-foot .hint {
    display: block;
  }

  .ow-shell .ow-sidebar-foot .ow-lang-toggle {
    flex-direction: row;
  }

  .ow-shell .ow-sidebar-foot .ow-lang-toggle button {
    font-size: 0.72rem;
    padding: 8px 6px;
  }

}

@media (max-width: 1024px) {
  .ow-admin-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }

  .ow-admin-shell > .ow-sidebar {
    grid-column: 1;
    grid-row: 1;
    max-width: none;
    height: auto;
    max-height: none;
    border-right: 0;
    border-bottom: 1px solid var(--ow-border);
  }

  .ow-admin-main {
    grid-column: 1;
    grid-row: 2;
  }

  .ow-admin-main .ow-table {
    min-width: 520px;
  }
}

@media (max-width: 1024px) {
  .ow-chat-header .sub {
    display: none;
  }

  .ow-history-drawer {
    width: min(360px, calc(100% - 12px));
    z-index: 55;
  }
}