:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --text: #1b1f24;
  --muted: #5f6b7a;
  --border: #d9dee5;
  --accent: #0b6bcb;
  --accent-text: #ffffff;
  --danger: #c62828;
  --warn-bg: #fff4d6;
  --zero: #8a94a3;
  --ok: #1e7d32;
  --radius: 8px;
  --mono: ui-monospace, 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --surface: #1a1f25;
    --surface-2: #232a32;
    --text: #e6e9ed;
    --muted: #9aa5b3;
    --border: #2f3842;
    --accent: #4ea1f3;
    --accent-text: #0b1520;
    --danger: #ef6b6b;
    --warn-bg: #3a3218;
    --zero: #6d7785;
    --ok: #6cc47a;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

[hidden] {
  display: none !important;
}

a {
  color: var(--accent);
}

h2 {
  margin: 0 0 8px;
  font-size: 1.3rem;
}

h3 {
  margin: 0;
  font-size: 1.1rem;
}

h4 {
  margin: 18px 0 6px;
  font-size: 0.95rem;
  color: var(--muted);
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--surface-2);
  padding: 1px 4px;
  border-radius: 4px;
}

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

.small {
  font-size: 0.85rem;
}

.hint {
  color: var(--muted);
  max-width: 75ch;
}

.error {
  color: var(--danger);
  margin: 4px 0 0;
}

.spacer {
  flex: 1;
}

/* Controles */
input,
select,
textarea,
button {
  font: inherit;
  color: inherit;
}

input,
select,
textarea {
  width: 100%;
  padding: 7px 9px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

input[type='checkbox'] {
  width: auto;
}

button {
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
  white-space: nowrap;
}

button:hover {
  background: var(--surface-2);
}

button:disabled {
  opacity: 0.55;
  cursor: default;
}

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

button.primary:hover {
  filter: brightness(1.08);
}

button.danger {
  color: var(--danger);
  border-color: var(--danger);
  background: transparent;
}

button.link {
  border: none;
  background: none;
  padding: 2px 4px;
  color: var(--accent);
}

button.small,
.data button {
  padding: 3px 9px;
  font-size: 0.85rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 0.85rem;
  color: var(--muted);
}

label > input,
label > select,
label > textarea {
  color: var(--text);
  font-size: 0.95rem;
}

label.check {
  flex-direction: row;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

/* Acceso */
.auth {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

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

.auth-card {
  width: min(380px, 100%);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.auth-card h1 {
  margin: 0;
  font-size: 1.4rem;
}

/* Barra superior */
.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  flex: 1;
}

.topbar nav a {
  padding: 5px 10px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--muted);
}

.topbar nav a.active {
  background: var(--surface-2);
  color: var(--text);
  font-weight: 600;
}

.user {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 0.9rem;
}

main {
  padding: 16px;
  max-width: 1400px;
  margin: 0 auto;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-bottom: 12px;
}

.toolbar input[type='search'] {
  flex: 1 1 280px;
  width: auto;
}

.toolbar select {
  width: auto;
}

/* Tablas */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

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

.data th,
.data td {
  padding: 7px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

.data th {
  position: sticky;
  top: 0;
  background: var(--surface-2);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  white-space: nowrap;
  user-select: none;
}

.data th[data-sort] {
  cursor: pointer;
}

.data th.sorted-asc::after {
  content: ' ▲';
}

.data th.sorted-desc::after {
  content: ' ▼';
}

.data tbody tr:last-child td {
  border-bottom: none;
}

.data.small td,
.data.small th {
  padding: 5px 8px;
  font-size: 0.85rem;
}

#stock-table tbody tr {
  cursor: pointer;
}

#stock-table tbody tr:hover {
  background: var(--surface-2);
}

.num {
  text-align: right !important;
  font-variant-numeric: tabular-nums;
}

.mono {
  font-family: var(--mono);
  font-size: 0.88em;
  white-space: nowrap;
}

td.desc {
  min-width: 260px;
  max-width: 520px;
}

td.stock {
  font-weight: 700;
  font-size: 1.05rem;
}

tr.zero td {
  color: var(--zero);
}

tr.low td.stock,
td.neg {
  color: var(--danger);
}

.pill {
  display: inline-block;
  padding: 0 7px;
  border-radius: 999px;
  font-size: 0.75rem;
  border: 1px solid var(--border);
  color: var(--muted);
  white-space: nowrap;
}

.pill.ok {
  color: var(--ok);
  border-color: var(--ok);
}

.pill.warn {
  color: var(--danger);
  border-color: var(--danger);
}

.delta-pos {
  color: var(--ok);
}

.delta-neg {
  color: var(--danger);
}

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

/* Importar */
.dropzone {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 110px;
  margin: 12px 0 16px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  font-size: 1rem;
  text-align: center;
  padding: 16px;
}

.dropzone.over {
  border-color: var(--accent);
  background: var(--surface-2);
}

.dropzone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.notice {
  margin: 0 0 12px;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--warn-bg);
  border: 1px solid var(--border);
}

.notice.ok {
  background: var(--surface);
  border-color: var(--ok);
}

.import-card {
  margin-bottom: 14px;
}

.import-card .head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  margin-bottom: 10px;
}

.import-card .head input {
  width: 180px;
}

.import-card details summary {
  cursor: pointer;
  color: var(--muted);
  margin-bottom: 8px;
}

/* Formularios */
.form-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 900px;
}

.form-grid fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px 14px;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px 14px;
}

.form-grid legend {
  font-weight: 600;
  padding: 0 6px;
}

.form-grid fieldset > div {
  grid-column: 1 / -1;
}

#manual-new {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px 14px;
}

.wide {
  grid-column: 1 / -1;
}

.form-grid.compact {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 10px 12px;
  max-width: none;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.picked {
  padding: 8px 10px;
  background: var(--surface-2);
  border-radius: 6px;
}

.suggest {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  max-height: 240px;
  overflow-y: auto;
  background: var(--surface);
}

.suggest li {
  padding: 6px 10px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}

.suggest li:last-child {
  border-bottom: none;
}

.suggest li:hover,
.suggest li.active {
  background: var(--surface-2);
}

/* Diálogos */
dialog {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 18px 20px;
  width: min(440px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
}

dialog.wide {
  width: min(960px, calc(100vw - 32px));
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
}

dialog form:not(.dlg-head) {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

dialog form.form-grid.compact {
  display: grid;
}

.dlg-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.close {
  font-size: 1.1rem;
  color: var(--muted) !important;
}

.part-stock {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 10px 12px;
  margin-bottom: 14px;
  background: var(--surface-2);
  border-radius: var(--radius);
}

.part-stock > div {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-right: 10px;
}

.big {
  font-size: 1.6rem;
}

/* Aviso */
#toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  z-index: 50;
  max-width: calc(100vw - 32px);
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--text);
  color: var(--bg);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
}

#toast.error {
  background: var(--danger);
  color: #fff;
}

/* Proyectos */
.project-new {
  display: grid;
  grid-template-columns: 2fr 1.2fr 0.6fr;
  gap: 12px;
  align-items: end;
  margin-bottom: 16px;
}

.project-new .form-actions {
  grid-column: 1 / -1;
  margin-top: 0;
}

.dropzone.compact {
  min-height: 0;
  margin: 0;
  padding: 10px;
  font-size: 0.9rem;
  color: var(--text);
}

.project-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-bottom: 6px;
}

.project-head h2 {
  margin: 0;
}

label.inline {
  flex-direction: row;
  align-items: center;
  gap: 6px;
}

label.inline input {
  width: 80px;
}

.summary {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin: 0 0 12px;
}

tr.need-buy td {
  background: var(--warn-bg);
}

tr.done td,
tr.dnp td {
  color: var(--zero);
}

td.refs {
  max-width: 220px;
  font-family: var(--mono);
  font-size: 0.85em;
}

.suggest.tall {
  max-height: 50vh;
  margin: 10px 0;
}

@media (max-width: 640px) {
  .project-new {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  main {
    padding: 12px;
  }
  .topbar {
    padding: 8px 12px;
  }
  td.desc {
    min-width: 200px;
  }
}