:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.4;
  --bg: #111827;
  --surface: #1f2937;
  --surface-border: #374151;
  --text: #f9fafb;
  --muted: #9ca3af;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --danger-text: #fca5a5;
  --success-bg: rgba(34, 197, 94, 0.15);
  --success-text: #86efac;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --warning-text: #fcd34d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.8rem 1.1rem;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button:hover:enabled {
  background: var(--accent-hover);
}

.secondary-button {
  background: transparent;
  border: 1px solid var(--surface-border);
  color: var(--text);
}

.secondary-button:hover:enabled {
  background: rgba(255, 255, 255, 0.08);
}

button:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  background: #111827;
  color: var(--text);
}

.app-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

.page-header,
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.page-copy,
.helper,
.muted {
  color: var(--muted);
}

.card {
  margin-top: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  background: var(--surface);
}

.stack {
  display: grid;
  gap: 1rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: flex-start;
  align-items: center;
}

.two-columns {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.field {
  display: grid;
  gap: 0.4rem;
}

.message {
  margin: 0;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
}

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

.message.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.message.warning {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.token-badge,
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font-size: 0.9rem;
}

.token-badge.authenticated,
.pill.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.pill.error {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.pill.warning {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.summary-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.summary-card {
  padding: 0.9rem 1rem;
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  background: rgba(17, 24, 39, 0.5);
}

.summary-card strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.35rem;
}

.panel {
  display: grid;
  gap: 0.75rem;
}

.error-item,
.upload-item,
.preview-item {
  padding: 0.9rem 1rem;
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  background: rgba(17, 24, 39, 0.4);
}

.error-item {
  border-color: rgba(239, 68, 68, 0.4);
}

.upload-item.success {
  border-color: rgba(34, 197, 94, 0.4);
}

.upload-item.error {
  border-color: rgba(239, 68, 68, 0.4);
}

.item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.45rem;
}

.item-header h3 {
  margin: 0;
  font-size: 1rem;
}

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.details {
  margin: 0.45rem 0 0;
  padding-left: 1rem;
}

.details li + li {
  margin-top: 0.2rem;
}

code {
  font-family: "SFMono-Regular", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

@media (max-width: 720px) {
  .page-header,
  .section-header,
  .item-header {
    align-items: flex-start;
    flex-direction: column;
  }
}