:root {
  --bg: #07080c;
  --card: #14161d;
  --card-2: #1b1f29;
  --text: #f8f8fb;
  --muted: #a4a6b2;
  --border: #2b3140;
  --primary: #ffcc00;
  --primary-text: #1d1d1d;
  --secondary: #232838;
  --inherit-bg: rgba(27, 125, 255, 0.16);
  --calc-bg: rgba(255, 255, 255, 0.08);
  --error-bg: rgba(255, 81, 81, 0.12);
  --ok: #2bd97f;
  --danger: #ff5757;
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100vh;
}

button, input, select {
  font: inherit;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

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

.page-header h1 {
  margin: 0;
  font-size: clamp(1.7rem, 1rem + 2vw, 2.2rem);
}

.page-main {
  display: grid;
  gap: 16px;
}

.card {
  background: linear-gradient(180deg, rgba(28,30,38,0.92), rgba(17,19,25,0.95));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 18px;
  box-shadow: var(--shadow);
}

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

.card-header h2,
.card-header h3 {
  margin: 0;
}

.btn {
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  padding: 12px 16px;
  transition: transform .12s ease, opacity .12s ease, background .12s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-text);
  font-weight: 700;
}

.btn-secondary {
  background: var(--secondary);
  color: var(--primary);
  border: 1px solid var(--border);
}

.small-btn {
  padding: 10px 14px;
}

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

.field-block {
  display: grid;
  gap: 8px;
}

.field-block label {
  color: var(--muted);
  font-size: .95rem;
}

.field-block input,
.field-block select {
  width: 100%;
  border: 1px solid var(--border);
  background: #0f1117;
  color: var(--text);
  border-radius: 14px;
  padding: 14px 16px;
  outline: none;
}

.field-block input:focus,
.field-block select:focus,
.cell-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 204, 0, 0.18);
}

.rate-mode-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

.rate-mode-btn {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 16px;
  background: #0f1117;
  color: var(--muted);
  cursor: pointer;
}

.rate-mode-btn.is-active {
  background: var(--secondary);
  color: var(--text);
  border-color: rgba(255,204,0,0.35);
}

.rate-panel {
  margin-top: 14px;
}

.rate-panel.is-hidden {
  display: none;
}

.rate-summary {
  margin: 10px 0 6px;
  font-size: 1.5rem;
  font-weight: 800;
}

.rate-status {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.help-list {
  margin: 8px 0 0 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: 8px;
}

.matrix-scroll {
  overflow-x: auto;
  padding-bottom: 8px;
}

.matrix-table {
  display: grid;
  gap: 8px;
  min-width: max-content;
}

.matrix-row {
  display: grid;
  gap: 8px;
  align-items: start;
}

.row-label-cell,
.case-header-cell,
.matrix-cell {
  border-radius: 16px;
}

.row-label-cell {
  padding: 10px 0;
}

.row-label-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.row-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.row-unit {
  color: var(--muted);
  margin-top: 4px;
  font-size: .92rem;
}

.mini-clear-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: .8rem;
}

.mini-clear-btn:hover {
  color: var(--primary);
}

.case-header-cell {
  background: var(--card-2);
  padding: 14px;
  border: 1px solid var(--border);
}

.case-header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.case-title {
  font-size: 1.2rem;
  font-weight: 800;
}

.case-subtitle {
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.35;
  font-size: .9rem;
}

.icon-btn {
  flex: 0 0 auto;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  width: 38px;
  height: 38px;
  cursor: pointer;
}

.case-delete-btn {
  color: var(--danger);
}

.matrix-cell {
  background: #0f1117;
  border: 1px solid var(--border);
  padding: 10px;
}

.matrix-cell.is-inherited {
  background: var(--inherit-bg);
}

.matrix-cell.is-calculated {
  background: var(--calc-bg);
}

.matrix-cell.is-error {
  background: var(--error-bg);
  border-color: rgba(255, 87, 87, 0.4);
}

.cell-main {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cell-input,
.cell-value,
.status-value,
.note-value,
.locked-value {
  flex: 1 1 auto;
  min-width: 0;
}

.cell-input {
  width: 100%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 12px;
  padding: 12px 12px;
}

.cell-value,
.locked-value,
.status-value,
.note-value {
  padding: 12px 4px;
  line-height: 1.35;
}

.locked-value {
  font-variant-numeric: tabular-nums;
}

.cell-subtext {
  margin-top: 8px;
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.3;
  min-height: 1.2em;
}

.status-value.ok {
  color: var(--ok);
  font-weight: 800;
}

.status-value.error {
  color: var(--danger);
  font-weight: 800;
}

.bottom-actions {
  margin-top: 16px;
}

.bottom-actions .btn {
  width: 100%;
  min-height: 52px;
  font-size: 1rem;
}

@media (max-width: 760px) {
  #app {
    padding: 16px 12px 28px;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 14px;
    border-radius: 18px;
  }
}