:root {
  --bg: #f4f1ea;
  --surface: #fffdf8;
  --surface-strong: #ffffff;
  --text: #20201d;
  --muted: #666158;
  --line: #ded7ca;
  --accent: #27645c;
  --accent-strong: #174c45;
  --danger: #a33c32;
  --warning-bg: #fff4d8;
  --warning-text: #6d4b00;
  --shadow: 0 18px 50px rgba(39, 33, 20, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

.app-header,
.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-end;
  padding: 36px 0 22px;
}

.data-transfer-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.data-transfer-action {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 10px;
}

.data-transfer-action[hidden] {
  display: none;
}

.data-transfer-action p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.data-transfer-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.backup-panel {
  padding: 0;
}

.backup-summary {
  padding: 16px 18px;
  cursor: pointer;
  list-style-position: inside;
}

.backup-summary h2 {
  display: inline;
  margin-left: 8px;
}

.backup-summary p {
  margin: 6px 0 0 24px;
  color: var(--muted);
}

.backup-content {
  border-top: 1px solid var(--line);
  padding: 14px 18px 18px;
}

.auth-panel {
  display: grid;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto 22px;
  grid-template-columns: minmax(220px, 1fr) minmax(260px, 420px) auto;
  gap: 16px;
  align-items: end;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 16px 18px;
}

.auth-form {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.auth-status {
  margin: 8px 0 0;
  color: var(--muted);
}

.auth-user {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
}

.auth-user span {
  color: var(--muted);
  font-weight: 750;
}

#authMessage {
  grid-column: 1 / -1;
  margin: 0;
}

.cloud-status {
  grid-column: 1 / -1;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  padding: 11px 12px;
  color: var(--muted);
  font-weight: 700;
}

.cloud-status-active {
  border-color: var(--accent);
  color: var(--text);
}

.backend-switch {
  display: flex;
  grid-column: 1 / -1;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.backend-switch > span {
  color: var(--muted);
  font-weight: 800;
}

.backend-buttons {
  display: inline-flex;
  gap: 8px;
}

.backend-buttons .button[aria-pressed="true"] {
  background: var(--accent);
  color: #fff;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.backend-buttons .cloud-login-required {
  border-style: dashed;
}

.backend-notes {
  display: grid;
  flex: 1 1 100%;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
}

.backend-notes p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.migration-panel {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: minmax(240px, 1fr) auto;
  gap: 14px;
  align-items: start;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.migration-panel[hidden] {
  display: none;
}

.migration-panel strong {
  display: block;
  margin-bottom: 4px;
}

.migration-panel p {
  margin: 0;
  color: var(--muted);
}

.migration-result {
  grid-column: 1 / -1;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  padding: 12px;
}

.migration-result ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.migration-result li + li {
  margin-top: 4px;
}

#backendStatus {
  flex: 1 1 260px;
  margin: 0;
  color: var(--muted);
}

.app-loading-status {
  grid-column: 1 / -1;
  width: 100%;
  min-height: 44px;
  margin: 2px 0 0;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--surface-strong);
  padding: 11px 12px;
  color: var(--text);
  font-weight: 750;
}

.app-loading-status[hidden] {
  display: none;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.12;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
}

h2 {
  font-size: 1.22rem;
}

.intro,
.panel-header p {
  margin: 8px 0 0;
  color: var(--muted);
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  padding: 9px 14px;
  cursor: pointer;
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.button-secondary,
.button-ghost {
  background: var(--surface);
  color: var(--accent);
}

.button-secondary:hover,
.button-ghost:hover {
  background: #eaf3ef;
  color: var(--accent-strong);
}

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

.button-danger:hover {
  background: #fae9e6;
  border-color: var(--danger);
  color: var(--danger);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.app-shell {
  display: grid;
  gap: 22px;
  padding-bottom: 42px;
}

.notice {
  border: 1px solid #efcf78;
  border-radius: 8px;
  background: var(--warning-bg);
  color: var(--warning-text);
  padding: 12px 14px;
  font-weight: 650;
}

.stats-grid,
.forms-grid,
.history-grid {
  display: grid;
  gap: 16px;
}

.stats-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.forms-grid,
.history-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat,
.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.stat {
  padding: 16px;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.stat strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.25rem, 2vw, 1.65rem);
}

.panel {
  padding: 18px;
}

.stock-panel {
  padding: 0;
}

.stock-summary {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  cursor: pointer;
  list-style-position: inside;
}

.stock-summary h2 {
  display: inline;
  margin-left: 8px;
}

.stock-summary p {
  margin: 8px 0 0 24px;
  color: var(--muted);
}

.stock-warning {
  border: 1px solid #efcf78;
  border-radius: 999px;
  background: var(--warning-bg);
  color: var(--warning-text);
  padding: 5px 9px;
  font-size: 0.85rem;
  font-weight: 750;
  white-space: nowrap;
}

.stock-content {
  border-top: 1px solid var(--line);
  padding: 0 18px 18px;
}

.stock-content > p {
  margin: 14px 0;
  color: var(--muted);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.full-width {
  grid-column: 1 / -1;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--text);
  padding: 10px 11px;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(39, 100, 92, 0.16);
}

.form-error {
  min-height: 24px;
  margin: 10px 0;
  color: var(--danger);
  font-weight: 700;
}

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

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

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 11px 9px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 0.86rem;
}

.negative {
  color: var(--danger);
  font-weight: 800;
}

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

.record {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  padding: 12px;
}

.record-main {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.record-title {
  font-weight: 800;
}

.record-meta,
.record-note {
  color: var(--muted);
  font-size: 0.92rem;
}

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

.empty-state {
  margin: 0;
  color: var(--muted);
}

.history-group {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
}

.history-group + .history-group {
  margin-top: 10px;
}

.history-group .history-group {
  margin: 10px 0 0 14px;
}

.history-summary {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  padding: 12px 14px;
  color: var(--text);
  list-style: none;
}

.history-summary::-webkit-details-marker {
  display: none;
}

.history-summary::before {
  content: "+";
  display: inline-flex;
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-weight: 800;
}

.history-group[open] > .history-summary::before {
  content: "−";
}

.history-summary-title {
  flex: 1;
  font-weight: 850;
}

.history-summary-meta {
  color: var(--muted);
  font-weight: 750;
  white-space: nowrap;
}

.history-summary-year {
  background: #f7fbf8;
}

.history-summary-year .history-summary-title {
  font-size: 1.12rem;
}

.history-summary-month {
  background: #fbfaf6;
}

.history-day {
  background: #fff;
}

.history-day-records {
  display: grid;
  gap: 8px;
  padding: 0 10px 10px 48px;
}

.record-compact {
  box-shadow: none;
}

.record-compact .button {
  min-height: 36px;
  padding: 7px 11px;
}

@media (max-width: 980px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .forms-grid,
  .history-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .app-header {
    align-items: stretch;
    flex-direction: column;
    padding-top: 24px;
  }

  .auth-panel,
  .auth-form {
    grid-template-columns: 1fr;
  }

  .auth-user {
    justify-content: flex-start;
  }

  .backend-switch {
    align-items: flex-start;
    flex-direction: column;
  }

  .backend-notes {
    grid-template-columns: 1fr;
  }

  .data-transfer-panel {
    grid-template-columns: 1fr;
  }

  .header-actions {
    justify-content: stretch;
  }

  .header-actions .button,
  .import-button {
    flex: 1 1 150px;
  }

  .stats-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .stock-summary,
  .panel-header,
  .record-main,
  .history-summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .stock-warning,
  .history-summary-meta {
    white-space: normal;
  }

  .history-group .history-group {
    margin-left: 8px;
  }

  .history-day-records {
    padding-left: 18px;
  }
}