:root {
  color-scheme: dark;
  --canvas: #0c0d0e;
  --paper: #16181c;
  --line: #26282d;
  --line-strong: #3c3f46;
  --ink: #ece9df;
  --muted: #96998f;
  --accent: #7b93ff;
  --accent-soft: rgba(123, 147, 255, 0.14);
  --danger: #e08a8a;
  --radius: 2px;
  --radius-md: 4px;
  --font-sans: ui-sans-serif, "SF Pro Text", "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}

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

button {
  cursor: pointer;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 10px 16px;
  min-height: 44px;
  background: #1a1c22;
  color: var(--ink);
  font-weight: 600;
  font-size: 14px;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

button:hover {
  border-color: var(--muted);
  background: #22252c;
}

button.primary {
  background: var(--accent);
  color: #0c0d0e;
  border-color: var(--accent);
  font-weight: 700;
}

button.primary:hover {
  background: #92a6ff;
  border-color: #92a6ff;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.wide {
  width: 100%;
  display: flex;
  margin: 14px 0;
}

.button-row {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.button-row button {
  flex: 1;
}

.app {
  max-width: 640px;
  min-height: 100dvh;
  margin: 0 auto;
  background: var(--canvas);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  position: relative;
}

.appbar {
  height: 60px;
  background: rgba(12, 13, 14, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 16px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.appbar strong {
  font-size: 17px;
  font-weight: 650;
  font-family: var(--font-serif);
  letter-spacing: 0.04em;
  color: var(--ink);
  flex: 1;
}

.icon-button {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 6px;
  font-size: 22px;
  min-width: 44px;
  min-height: 44px;
  display: grid;
  place-items: center;
}

.icon-button:hover {
  color: var(--ink);
  border-color: var(--line);
  background: var(--paper);
}

.screen {
  padding: 16px 16px 88px;
}

.auth-screen {
  padding-top: 10vh;
  text-align: center;
}

.brand-mark {
  background: var(--accent);
  color: #0c0d0e;
  font-size: 32px;
  font-weight: 800;
  font-family: var(--font-serif);
  width: 68px;
  height: 68px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  margin: 0 auto 20px;
  box-shadow: 0 8px 24px rgba(123, 147, 255, 0.25);
}

.auth-screen h1 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.hint {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  margin: 0 0 16px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 0 0 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.card h2 {
  font-size: 16px;
  font-weight: 650;
  color: var(--ink);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  font-family: var(--font-serif);
}

.form-card {
  text-align: left;
  margin-top: 24px;
}

form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  font-weight: 600;
  font-size: 13px;
  color: var(--muted);
}

input, select, textarea {
  background: #111215;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  min-height: 44px;
  padding: 10px 14px;
  width: 100%;
  color: var(--ink);
  font-size: 14px;
  transition: all 0.15s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

textarea {
  resize: vertical;
}

#custom-client-fields {
  display: grid;
  gap: 12px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 6px 0 14px;
}

.toolbar strong {
  font-size: 18px;
  font-family: var(--font-serif);
}

.toolbar button {
  min-height: 36px;
  padding: 6px 14px;
  font-size: 13px;
}

.message {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  min-height: 20px;
  margin: 8px 0;
}

.message.error {
  color: var(--danger);
}

.message.success {
  color: #82e2b3;
}

.list {
  display: grid;
  gap: 10px;
}

.list-row {
  width: 100%;
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 16px;
  border-radius: var(--radius-md);
  display: grid;
  gap: 6px;
  color: var(--ink);
  transition: border-color 0.15s ease, background 0.15s ease;
  cursor: pointer;
}

.list-row:hover {
  border-color: var(--accent);
  background: #1a1c22;
}

.list-row strong {
  font-size: 15px;
  font-weight: 650;
  color: var(--ink);
}

.list-row small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.status {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 650;
  padding: 2px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  width: fit-content;
}

.status.active {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: rgba(123, 147, 255, 0.35);
}

.status.closed {
  color: var(--muted);
  background: rgba(150, 153, 143, 0.1);
  border-color: var(--line);
}

.tabs {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(640px, 100%);
  height: 64px;
  background: rgba(12, 13, 14, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom);
}

.tabs button {
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-size: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 4px;
  min-height: 100%;
  position: relative;
}

.tabs button span {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.tabs button:hover,
.tabs button.selected {
  color: var(--accent);
}

.tabs button.selected::after {
  content: "";
  position: absolute;
  top: 0;
  left: 25%;
  width: 50%;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.detail-meta {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.requirement {
  display: inline-block;
  background: var(--accent-soft);
  border: 1px solid rgba(123, 147, 255, 0.25);
  border-radius: var(--radius);
  padding: 4px 8px;
  margin: 3px;
  font-size: 12px;
  color: var(--accent);
}

.field-stack {
  display: grid;
  gap: 14px;
}

.gesture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 260px;
  margin: 16px auto;
}

.gesture-grid button {
  aspect-ratio: 1;
  border-radius: 50%;
  font-size: 18px;
  font-weight: 700;
  border: 2px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
}

.gesture-grid button:hover {
  border-color: var(--accent);
}

.gesture-grid .selected {
  background: var(--accent);
  color: #0c0d0e;
  border-color: var(--accent);
}

.scanner {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: #000;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-strong);
}

.preview {
  max-width: 100%;
  max-height: 240px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

#session-list {
  display: grid;
  gap: 8px;
}

.session-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.session-row small {
  display: block;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

#course-filter, #group-filter {
  margin-bottom: 14px;
}

[hidden] {
  display: none !important;
}

.sign-map {
  height: 320px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: #111215;
  margin: 8px 0;
}

.location-range-badge {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: 10px;
  border: 1px solid var(--line);
  background: #14151a;
  color: var(--ink);
  transition: all 0.2s ease;
}

.location-range-badge.valid {
  background: rgba(23, 111, 98, 0.18);
  border-color: #176f62;
  color: #5cdbd3;
}

.location-range-badge.invalid {
  background: rgba(209, 58, 58, 0.18);
  border-color: #d13a3a;
  color: #ff7875;
}

.location-range-badge.warning {
  background: rgba(212, 136, 6, 0.18);
  border-color: #d48806;
  color: #ffc069;
}

.coord-action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0;
}

.coord-action-bar button {
  flex: 1 1 calc(50% - 4px);
  min-height: 44px;
  font-size: 13px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.coord-action-bar button.primary-action {
  background: #176f62;
  border-color: #176f62;
  color: #fff;
  font-weight: 600;
  flex: 1 1 100%;
}

.coord-action-bar button.primary-action:hover {
  background: #1f8a7a;
}

.coord-paste-box {
  background: #131418;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 12px;
  margin: 8px 0;
  display: grid;
  gap: 8px;
}

.coord-paste-box h3 {
  font-size: 13px;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
}

.coord-paste-box input,
.coord-paste-box textarea {
  width: 100%;
  box-sizing: border-box;
  min-height: 48px;
  font-size: 13px;
  font-family: inherit;
  resize: vertical;
}

.actor-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.actor-row button:first-child {
  flex: 1;
  text-align: left;
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.actor-row button:first-child:hover {
  border-color: var(--accent);
}

.tag-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 76px auto;
  align-items: end;
  gap: 8px;
}

.tag-form input[type=color] {
  padding: 4px;
  height: 44px;
  cursor: pointer;
}

.tag-row {
  display: grid;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.tag-head {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.tag-head strong {
  flex: 1;
  color: var(--ink);
}

.tag-head button {
  min-height: 34px;
  padding: 6px 10px;
  font-size: 12px;
}

.tag-members {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag-members label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius);
  background: #131418;
  border: 1px solid var(--line);
  font-size: 12px;
  cursor: pointer;
}

.tag-members input {
  width: auto;
  min-height: auto;
}

.tag-chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius);
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  margin-right: 4px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.stat-cell {
  padding: 12px 6px;
  border-radius: var(--radius);
  background: #131418;
  border: 1px solid var(--line);
  text-align: center;
}

.stat-cell strong {
  display: block;
  color: var(--accent);
  font-size: 18px;
  font-family: var(--font-mono);
}

.stat-cell span {
  font-size: 11px;
  color: var(--muted);
}

#share-qr {
  display: block;
  max-width: 100%;
  width: 280px;
  margin: 14px auto;
  background: #fff;
  padding: 12px;
  border-radius: var(--radius-md);
}

.captcha-box {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px;
  background: #131418;
}

.captcha-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 2;
  overflow: hidden;
  background: #000;
  border-radius: var(--radius);
}

.captcha-visual > img:first-child {
  width: 100%;
  height: 100%;
  object-fit: fill;
}

.captcha-cutout {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 17.5%;
  object-fit: fill;
}

#membership-banner {
  background: rgba(224, 138, 138, 0.1);
  border: 1px solid rgba(224, 138, 138, 0.35);
  color: #f2a6a6;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: 14px;
}

.clone-banner {
  background: var(--accent-soft);
  border: 1px solid rgba(123, 147, 255, 0.35);
  color: var(--accent);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
}

.clone-banner button {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 4px 10px;
  min-height: 32px;
  font-size: 12px;
}

.share-face-choice {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.share-face-choice input {
  width: 20px;
  min-height: 20px;
}

.share-face-choice img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.face-library-row {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.face-library-row img {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.face-library-row strong {
  flex: 1;
  color: var(--ink);
  font-size: 14px;
}

.face-library-row button {
  min-height: 36px;
  padding: 6px 12px;
  font-size: 12px;
}

.batch-user {
  border-top: 1px solid var(--line);
  padding: 12px 0;
  display: grid;
  gap: 8px;
}

.batch-user:first-of-type {
  border-top: 0;
}

.batch-user-choice {
  display: flex;
  align-items: center;
  gap: 10px;
}

.batch-user-choice input {
  width: 20px;
  min-height: 20px;
}

.batch-user-face {
  display: grid;
  gap: 8px;
  padding-left: 30px;
}

.batch-result {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper);
  font-size: 13px;
  line-height: 1.5;
}

.batch-result.success {
  border-color: rgba(130, 226, 179, 0.4);
  color: #82e2b3;
}

.batch-result.error {
  border-color: rgba(224, 138, 138, 0.4);
  color: var(--danger);
}

.batch-captcha {
  margin-top: 8px;
}

@media (max-width: 420px) {
  .tag-form {
    grid-template-columns: minmax(0, 1fr) 64px;
  }
  .tag-form button {
    grid-column: 1 / -1;
  }
  .stat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .favorite-row {
    flex-direction: column;
    align-items: flex-start;
  }
  .favorite-actions {
    width: 100%;
    justify-content: flex-end;
  }
}

.coord-fav-box {
  margin: 14px 0 6px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.coord-fav-box h3 {
  font-size: 13px;
  font-weight: 650;
  margin: 0 0 8px;
  color: var(--ink);
}

.favorite-chips-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.favorite-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #1a1c22;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s ease;
  min-height: 34px;
}

.favorite-chip:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: #fff;
}

.favorite-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #0c0d0e;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(123, 147, 255, 0.35);
}

.coord-fav-save-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.coord-fav-save-row input {
  flex: 1;
  min-height: 40px;
}

.coord-fav-save-row button {
  min-height: 40px;
  white-space: nowrap;
}

.favorite-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.favorite-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.favorite-info strong {
  font-size: 14px;
  color: var(--ink);
}

.favorite-info small {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.favorite-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.favorite-actions button {
  min-height: 34px;
  padding: 4px 10px;
  font-size: 12px;
}

.favorite-actions button.danger-action {
  border-color: rgba(224, 138, 138, 0.35);
  color: var(--danger);
}

.favorite-actions button.danger-action:hover {
  border-color: var(--danger);
  background: rgba(224, 138, 138, 0.1);
}

.input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 480px) {
  .input-grid {
    grid-template-columns: 1fr;
  }
}