/* Paleta do app (PRD_MVP §9). Sem fonte externa: a página não carrega nada de fora. */
:root {
  color-scheme: dark;
  --bg: #100e13;
  --bg-deep: #08070a;
  --card: #1a171f;
  --border: #2a2632;
  --amber: #f7a32b;
  --text: #f2eef6;
  --muted: #9c90a8;
  --ok: #7bbf8a;
  --error: #ff8a80;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.4;
}

/* `hidden` precisa vencer o `display` das classes (.login é grid). */
[hidden] {
  display: none !important;
}

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

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 16px 0;
}

h1 {
  font-size: 1.35rem;
  margin: 0;
}

h2 {
  font-size: 1.1rem;
  margin: 0;
}

button {
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 14px;
  min-height: 40px;
  cursor: pointer;
}

button:hover:not(:disabled) {
  border-color: var(--muted);
}

button.primary {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--bg);
  font-weight: 600;
}

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

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

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

input {
  font: inherit;
  color: var(--text);
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  min-height: 32px;
  box-sizing: border-box;
}

input[aria-invalid="true"] {
  border-color: var(--error);
}

input[type="number"] {
  width: 4.8em;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.login {
  max-width: 420px;
  margin: 10vh auto 0;
  display: grid;
  gap: 16px;
}

.login form {
  display: grid;
  gap: 10px;
}

.message {
  margin: 0;
  min-height: 1.4em;
  color: var(--muted);
}

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

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

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.tabs-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

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

.tab[aria-current="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--bg);
  font-weight: 600;
}

.arrow {
  font-size: 1.3rem;
  padding: 4px 12px;
}

.session {
  display: grid;
  gap: 12px;
  justify-items: start;
}

.session-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  width: 100%;
}

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

.table-wrap {
  width: 100%;
  overflow-x: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
}

table {
  border-collapse: collapse;
  width: 100%;
}

th,
td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

tbody tr:last-child td {
  border-bottom: 0;
}

th {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.85rem;
}

.hint {
  display: block;
  font-size: 0.75rem;
}

.order {
  display: flex;
  gap: 6px;
  align-items: center;
  white-space: nowrap;
}

.order button {
  min-height: 32px;
  padding: 2px 8px;
}

.range {
  display: flex;
  gap: 6px;
  align-items: center;
  white-space: nowrap;
}

td.name input {
  width: 100%;
  min-width: 14em;
}

.save-bar {
  position: sticky;
  bottom: 0;
  margin-top: 24px;
  padding: 12px 0 16px;
  background: var(--bg);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.errors {
  flex-basis: 100%;
  margin: 0;
  padding-left: 1.2em;
  color: var(--error);
  max-height: 30vh;
  overflow-y: auto;
}

.errors:empty {
  display: none;
}

dialog {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 14px;
  width: min(440px, calc(100vw - 48px));
  padding: 20px;
}

dialog::backdrop {
  background: rgb(0 0 0 / 60%);
}

dialog form,
#session-code-field {
  display: grid;
  gap: 10px;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}