:root {
  --bg-page: #0d1117;
  --bg-card: #161b22;
  --bg-input: #0d1117;
  --bg-hover: rgba(88,166,255,0.05);
  --border: #30363d;
  --border-hover: #58a6ff;
  --text-primary: #f0f6fc;
  --text-secondary: #c9d1d9;
  --text-muted: #8b949e;
  --text-dim: #484f58;
  --accent-blue: #58a6ff;
  --accent-green: #7ee787;
  --btn-primary-bg: #238636;
  --btn-primary-border: #2ea043;
  --btn-primary-hover: #2ea043;
  --btn-success-bg: #1f6feb;
  --btn-success-border: #388bfd;
  --btn-success-hover: #388bfd;
  --btn-secondary-bg: #21262d;
  --btn-secondary-border: #30363d;
  --btn-secondary-hover: #30363d;
  --danger: #f85149;
  --danger-text: #ff7b72;
  --danger-bg: rgba(248,81,73,0.1);
  --progress-bar-from: #238636;
  --progress-bar-to: #7ee787;
  --spinner-color: #7ee787;
  --table-header-bg: #21262d;
  --subtotal-border: #30363d;
  --response-text: #7ee787;
  --warning-color: #d29922;
  --warning-bg: rgba(210,153,34,0.1);
}

[data-theme="light"] {
  --bg-page: #f6f8fa;
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --bg-hover: rgba(9,105,218,0.05);
  --border: #d0d7de;
  --border-hover: #0969da;
  --text-primary: #1f2328;
  --text-secondary: #24292f;
  --text-muted: #656d76;
  --text-dim: #8c959f;
  --accent-blue: #0969da;
  --accent-green: #1a7f37;
  --btn-primary-bg: #238636;
  --btn-primary-border: #2ea043;
  --btn-primary-hover: #2ea043;
  --btn-success-bg: #0969da;
  --btn-success-border: #2188ff;
  --btn-success-hover: #2188ff;
  --btn-secondary-bg: #f6f8fa;
  --btn-secondary-border: #d0d7de;
  --btn-secondary-hover: #eaeef2;
  --danger: #cf222e;
  --danger-text: #cf222e;
  --danger-bg: rgba(207,34,46,0.08);
  --progress-bar-from: #238636;
  --progress-bar-to: #1a7f37;
  --spinner-color: #1a7f37;
  --table-header-bg: #f6f8fa;
  --subtotal-border: #d0d7de;
  --response-text: #1a7f37;
  --warning-color: #9a6700;
  --warning-bg: rgba(154,103,0,0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  background: var(--bg-page);
  color: var(--text-secondary);
  min-height: 100vh;
  transition: background 0.25s, color 0.25s;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 20px;
}

header {
  text-align: center;
  margin-bottom: 32px;
}

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

header h1 {
  font-size: 1.6rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 4px;
}

.btn-theme {
  flex-shrink: 0;
  font-size: 1.2rem;
  padding: 4px 10px;
  background: var(--btn-secondary-bg);
  border-color: var(--border);
  color: var(--text-muted);
  line-height: 1;
  margin-top: 2px;
}

.btn-theme:hover {
  background: var(--btn-secondary-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
  transition: background 0.25s, border-color 0.25s;
}

.card h2 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--border-hover);
  background: var(--bg-hover);
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.upload-icon {
  stroke: var(--accent-blue);
  stroke-width: 1.5;
  fill: none;
  opacity: 0.8;
}

.drop-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.drop-text .link {
  color: var(--accent-blue);
  text-decoration: underline;
  cursor: pointer;
}

.drop-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.file-info {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.file-info.hidden {
  display: none;
}

#file-name {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text-primary);
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  border: 1px solid;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--btn-primary-bg);
  border-color: var(--btn-primary-border);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--btn-primary-hover);
}

.btn-success {
  background: var(--btn-success-bg);
  border-color: var(--btn-success-border);
  color: #fff;
}

.btn-success:hover:not(:disabled) {
  background: var(--btn-success-hover);
}

.btn-secondary {
  background: var(--btn-secondary-bg);
  border-color: var(--btn-secondary-border);
  color: var(--text-secondary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--btn-secondary-hover);
}

.hidden {
  display: none !important;
}

.progress-stage {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.95rem;
  color: var(--spinner-color);
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--spinner-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.progress-bar-container {
  height: 4px;
  background: var(--table-header-bg);
  border-radius: 2px;
  margin-bottom: 12px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--progress-bar-from), var(--progress-bar-to));
  border-radius: 2px;
  width: 0%;
  transition: width 0.4s ease;
}

.progress-steps {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.progress-steps .step.active {
  color: var(--spinner-color);
}

.progress-steps .step.done {
  color: var(--progress-bar-from);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.result-table th {
  background: var(--table-header-bg);
  color: var(--text-muted);
  font-weight: 500;
  padding: 8px 12px;
  text-align: left;
  border: 1px solid var(--border);
}

.result-table td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.result-table td.label {
  color: var(--text-muted);
  width: 35%;
}

.result-table td.value {
  font-family: inherit;
  text-align: right;
}

.result-table td.value.money {
  font-variant-numeric: tabular-nums;
}

.result-table .subtotal-row td {
  border-top: 2px solid var(--subtotal-border);
  font-weight: 600;
}

.result-table .empty {
  text-align: center;
  color: var(--text-dim);
  padding: 24px;
}

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

.items-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.items-table th {
  background: var(--table-header-bg);
  color: var(--text-muted);
  font-weight: 500;
  padding: 6px 10px;
  text-align: left;
  border: 1px solid var(--border);
  white-space: nowrap;
}

.items-table td {
  padding: 6px 10px;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.items-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.items-table td.center {
  text-align: center;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  justify-content: flex-end;
}

.error-box {
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  border-radius: 6px;
  padding: 12px 16px;
  color: var(--danger-text);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.success-box {
  background: rgba(126,231,135,0.1);
  border: 1px solid var(--accent-green);
  border-radius: 6px;
  padding: 12px 16px;
  color: var(--accent-green);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.error-box.warning {
  background: var(--warning-bg);
  border-color: var(--warning-color);
  color: var(--warning-color);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group select {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.2s, background 0.25s;
}

.form-group select:focus {
  outline: none;
  border-color: var(--border-hover);
}

.response-box {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  font-size: 0.8rem;
  max-height: 400px;
  overflow: auto;
  color: var(--response-text);
  white-space: pre-wrap;
  word-break: break-all;
  transition: background 0.25s, border-color 0.25s, color 0.25s;
}

.editable-input {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: inherit;
  padding: 2px 6px;
  width: 100%;
  box-sizing: border-box;
  transition: border-color 0.15s, background 0.15s;
}

.editable-input:hover {
  border-color: var(--border);
}

.editable-input:focus {
  outline: none;
  border-color: var(--border-hover);
  background: var(--bg-hover);
}

.editable-input.money {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.editable-input.sm {
  max-width: 100px;
}

.editable-input.wide {
  min-width: 180px;
}

td.num .editable-input {
  text-align: right;
  max-width: 90px;
}

td.center .editable-input {
  text-align: center;
  max-width: 40px;
}

.btn-del-item {
  background: none;
  border: 1px solid transparent;
  color: var(--danger);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 4px;
  transition: background 0.15s, border-color 0.15s;
  line-height: 1;
}

.btn-del-item:hover {
  background: var(--danger-bg);
  border-color: var(--danger);
}

#login-section {
  max-width: 400px;
  margin: 60px auto 0;
}

#login-section h1 {
  text-align: left;
  font-size: 1.4rem;
  color: var(--text-primary);
}

#login-section .subtitle {
  text-align: left;
  color: var(--text-muted);
}

.form-input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.2s, background 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--border-hover);
  background: var(--bg-hover);
}

#user-display {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Token exhaustion warning banner */
.alert {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
}
.alert-warning {
  background: rgba(210,153,34,0.12);
  border: 1px solid rgba(210,153,34,0.4);
  color: #d4a72c;
}
.alert-warning strong {
  color: #e3b341;
}
.alert.hidden {
  display: none;
}