*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #F1F5F9;
  --surface: #FFFFFF;
  --surface-2: #F8FAFC;
  --border: #E2E8F0;
  --text: #1E293B;
  --text-2: #475569;
  --text-3: #94A3B8;

  --primary: #6366F1;
  --primary-light: #EEF2FF;
  --primary-dark: #4F46E5;

  --success: #059669;
  --success-light: #ECFDF5;
  --success-border: #6EE7B7;

  --info: #2563EB;
  --info-light: #EFF6FF;
  --info-border: #93C5FD;

  --warning: #D97706;
  --warning-light: #FFFBEB;
  --warning-border: #FCD34D;

  --danger: #DC2626;
  --danger-light: #FEF2F2;
  --danger-border: #FCA5A5;

  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 8px;

  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.08), 0 1px 2px -1px rgb(0 0 0 / 0.06);
  --shadow-md: 0 4px 12px -2px rgb(0 0 0 / 0.1), 0 2px 6px -2px rgb(0 0 0 / 0.06);
}

html.dark {
  --bg: #0F172A;
  --surface: #1E293B;
  --surface-2: #162032;
  --border: #334155;
  --text: #F1F5F9;
  --text-2: #CBD5E1;
  --text-3: #94A3B8;
  --primary-light: #1E1B4B;
  --success-light: #052E16;
  --success-border: #166534;
  --info-light: #0C1A3A;
  --info-border: #1E3A8A;
  --warning-light: #1C1408;
  --warning-border: #92400E;
  --danger-light: #2D0707;
  --danger-border: #991B1B;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.3), 0 1px 2px -1px rgb(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px -2px rgb(0 0 0 / 0.4), 0 2px 6px -2px rgb(0 0 0 / 0.3);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
}

/* Header */

.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-logo {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--primary), #8B5CF6);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}

.header-brand h1 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.settings-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--surface);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.settings-btn:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dark-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--surface);
  color: var(--text-2);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
}

.dark-btn:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* Main layout */

.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 24px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Stats overview */

.stats-overview {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: start;
}

/* RWA Hero Card */
.rwa-card {
  flex: 2 1 220px;
  background: linear-gradient(135deg, #6366F1 0%, #7C3AED 100%);
  border-radius: var(--radius);
  padding: 30px 32px 28px;
  color: white;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 24px -4px rgb(99 102 241 / 0.35);
}

.rwa-card::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  pointer-events: none;
}

.rwa-card::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: 30px;
  width: 140px;
  height: 140px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
  pointer-events: none;
}

.rwa-label {
  font-size: 11px;
  font-weight: 600;
  opacity: 0.75;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rwa-value {
  font-size: 62px;
  font-weight: 800;
  line-height: 1;
  margin: 10px 0 10px;
  letter-spacing: -2.5px;
}

.rwa-value.no-data {
  font-size: 40px;
  letter-spacing: -1px;
  opacity: 0.5;
}

.classification-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.rwa-breakdown {
  margin-top: 18px;
  font-size: 12px;
  opacity: 0.7;
  line-height: 1.8;
}

/* Year stat cards */
.year-stat-card {
  flex: 1 1 160px;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.year-stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.year-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.year-weight-pill {
  font-size: 11px;
  color: var(--text-3);
  background: var(--surface-2);
  padding: 2px 9px;
  border-radius: 99px;
  border: 1px solid var(--border);
  font-weight: 500;
}

.year-avg {
  font-size: 32px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -1.2px;
  line-height: 1;
}

.year-avg.no-data {
  font-size: 22px;
  color: var(--text-3);
  font-weight: 500;
}

.year-credits-label {
  font-size: 12px;
  color: var(--text-3);
  margin: 6px 0 10px;
}

.progress-bar {
  height: 6px;
  background: var(--bg);
  border-radius: 99px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), #8B5CF6);
  border-radius: 99px;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Content grid */

.content-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 20px;
  align-items: start;
}

/* Cards */

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.card h2 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--text);
}

.card-subtitle {
  font-size: 12px;
  color: var(--text-3);
  margin: 4px 0 16px;
}

/* Year tabs */

.year-tabs {
  display: flex;
  gap: 3px;
  padding: 3px;
  background: var(--surface-2);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  margin: 14px 0 18px;
  width: fit-content;
}

.tab {
  padding: 6px 22px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-3);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.tab.active {
  background: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow);
}

.tab:hover:not(.active) {
  color: var(--text-2);
}

/* Add module form */

.add-form {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  padding: 16px;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.12);
}

.form-group input[type="number"] {
  width: 90px;
  height: 36px;
}

.form-group input[type="text"] {
  width: 140px;
  height: 36px;
}

.form-group select {
  width: 110px;
  height: 36px;
  cursor: pointer;
}

#credits-input {
  width: 110px;
}

/* btn-add sits inside a form-group, so it must match input/select height exactly */

/* keeps the Add button vertically aligned with the labelled inputs */
.label-spacer {
  visibility: hidden;
  pointer-events: none;
}

.btn-add {
  height: 36px;
  padding: 0 18px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  font-family: inherit;
  box-shadow: 0 1px 4px rgb(99 102 241 / 0.3);
}

.btn-add:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgb(99 102 241 / 0.35);
}

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

/* Module list */

.modules-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.modules-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.modules-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.modules-summary {
  font-size: 12px;
  color: var(--text-3);
}

.module-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--surface-2);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.module-num {
  font-size: 11px;
  color: var(--text-3);
  width: 18px;
  flex-shrink: 0;
  font-weight: 500;
}

.module-grade {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  width: 52px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.module-credits-tag {
  font-size: 11px;
  color: var(--text-3);
  background: var(--bg);
  padding: 2px 8px;
  border-radius: 99px;
  border: 1px solid var(--border);
  font-weight: 500;
  width: 52px;
  text-align: center;
  flex-shrink: 0;
}

.module-cls-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 99px;
  margin-left: auto;
}

.delete-btn {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  padding: 3px 5px;
  border-radius: 5px;
  font-size: 13px;
  transition: all 0.15s;
  line-height: 1;
  font-family: inherit;
}

.delete-btn:hover {
  color: var(--danger);
  background: var(--danger-light);
}

.module-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.edit-btn {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  padding: 3px 5px;
  border-radius: 5px;
  font-size: 13px;
  transition: all 0.15s;
  line-height: 1;
  font-family: inherit;
}

.edit-btn:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.module-editing {
  background: var(--primary-light);
  border-color: var(--primary);
  gap: 8px;
}

.module-editing input,
.module-editing select {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  outline: none;
  background: var(--surface);
  color: var(--text);
  height: 30px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.module-editing input:focus,
.module-editing select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgb(99 102 241 / 0.12);
}

.module-editing .edit-name   { flex: 1; min-width: 60px; }
.module-editing .edit-grade  { width: 68px; }
.module-editing .edit-credits { width: 90px; }

.edit-save-btn {
  height: 30px;
  padding: 0 14px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
  transition: background 0.15s;
}

.edit-save-btn:hover { background: var(--primary-dark); }

.edit-cancel-btn {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  padding: 3px 5px;
  border-radius: 5px;
  font-size: 13px;
  transition: all 0.15s;
  line-height: 1;
  font-family: inherit;
  height: 30px;
}

.edit-cancel-btn:hover {
  color: var(--danger);
  background: var(--danger-light);
}

.empty-state {
  text-align: center;
  padding: 32px 20px;
  color: var(--text-3);
  font-size: 13px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-sm);
}

.empty-state-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

/* Target analysis */

.analysis-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.target-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  margin-bottom: 8px;
  transition: transform 0.1s;
}

.target-row:last-child {
  margin-bottom: 0;
}

.target-percent {
  font-size: 20px;
  font-weight: 800;
  min-width: 48px;
  letter-spacing: -0.5px;
}

.target-body {
  flex: 1;
}

.target-req-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  opacity: 0.6;
  margin-bottom: 1px;
}

.target-req-value {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.target-status-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 99px;
  white-space: nowrap;
}

/* Target row color themes */
.tr-achieved   { background: #F0FDF4; border-color: #86EFAC; }
.tr-easy       { background: #F0FDF4; border-color: #86EFAC; }
.tr-moderate   { background: #EFF6FF; border-color: #93C5FD; }
.tr-hard       { background: #FFFBEB; border-color: #FCD34D; }
.tr-vhard      { background: #FFF7ED; border-color: #FDBA74; }
.tr-impossible { background: #FEF2F2; border-color: #FCA5A5; }

.ts-achieved   { background: #DCFCE7; color: #15803D; }
.ts-easy       { background: #DCFCE7; color: #15803D; }
.ts-moderate   { background: #DBEAFE; color: #1D4ED8; }
.ts-hard       { background: #FEF9C3; color: #A16207; }
.ts-vhard      { background: #FFEDD5; color: #C2410C; }
.ts-impossible { background: #FEE2E2; color: #B91C1C; }

/* Module classification colour helpers */
.mc-first  { background: #EEF2FF; color: #4338CA; }
.mc-upper  { background: #EFF6FF; color: #1D4ED8; }
.mc-lower  { background: #FFFBEB; color: #B45309; }
.mc-third  { background: #FFF7ED; color: #C2410C; }
.mc-fail   { background: #FEF2F2; color: #B91C1C; }

/* What-if */

.whatif-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 8px;
}

.whatif-input {
  width: 90px;
  height: 36px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.whatif-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.12);
}

.whatif-result {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.whatif-rwa {
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
  font-variant-numeric: tabular-nums;
}

.whatif-cls {
  font-size: 13px;
  color: var(--text-2);
  font-weight: 500;
}

/* Export buttons */

.export-row {
  display: flex;
  gap: 8px;
}

.btn-export {
  padding: 7px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}

.btn-export:hover {
  background: var(--bg);
  border-color: var(--text-3);
  color: var(--text);
}

/* Year configuration rows in settings */

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

.year-label-input {
  flex: 1;
  min-width: 70px;
  max-width: 110px;
  padding: 7px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.year-label-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.12);
}

.year-config-label {
  font-size: 14px;
  color: var(--text-2);
  min-width: 60px;
}

.year-remove-placeholder {
  display: inline-block;
  width: 28px;
}

.year-remove-btn {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 5px;
  font-size: 13px;
  transition: all 0.15s;
  font-family: inherit;
}

.year-remove-btn:hover {
  color: var(--danger);
  background: var(--danger-light);
}

.btn-add-year {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 7px 14px;
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-3);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  text-align: center;
}

.btn-add-year:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-light);
}

/* Settings modal */

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(4px);
  animation: fadeOverlay 0.15s ease;
}

@keyframes fadeOverlay {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.overlay.hidden {
  display: none;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  width: 480px;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 64px);
  overflow: auto;
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.3);
  animation: slideModal 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideModal {
  from { opacity: 0; transform: translateY(-12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 28px 0;
}

.modal-header h2 {
  font-size: 17px;
  font-weight: 700;
}

.modal-close-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-3);
  font-size: 18px;
  padding: 4px;
  border-radius: 6px;
  line-height: 1;
  transition: all 0.15s;
  font-family: inherit;
}

.modal-close-btn:hover {
  background: var(--surface-2);
  color: var(--text);
}

.modal-body {
  padding: 22px 28px;
}

.settings-group {
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.settings-group:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.settings-group h3 {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: 14px;
}

.settings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.settings-row label {
  font-size: 14px;
  color: var(--text-2);
}

.settings-row input {
  width: 80px;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--surface);
  color: var(--text);
  text-align: right;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.settings-row input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.12);
}

.settings-row input[type="text"] {
  width: 160px;
  text-align: left;
}

/* Input with baked-in unit suffix (e.g. the % fields in settings) */
.input-unit-group {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  overflow: hidden;
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.input-unit-group:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.12);
}

.input-unit-group input {
  width: 52px;
  padding: 7px 6px 7px 10px;
  border: none;
  outline: none;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  text-align: right;
  background: transparent;
  /* override the generic .settings-row input rule */
  box-shadow: none;
}

.input-unit-group .unit {
  display: flex;
  align-items: center;
  padding: 0 9px 0 3px;
  font-size: 13px;
  color: var(--text-3);
  font-weight: 500;
  border-left: 1px solid var(--border);
  background: var(--surface-2);
  user-select: none;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 0 28px 24px;
}

.btn-primary {
  padding: 8px 20px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-secondary {
  padding: 8px 20px;
  background: var(--surface-2);
  color: var(--text-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}

.btn-secondary:hover {
  background: var(--bg);
  border-color: var(--text-3);
}

.settings-note {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 6px;
  line-height: 1.5;
}

/* Toast */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: #1E293B;
  color: #F1F5F9;
  border: 1px solid #334155;
  padding: 10px 20px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 500;
  z-index: 300;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

html.dark .toast {
  background: #E2E8F0;
  color: #1E293B;
  border-color: #CBD5E1;
}

html.dark .toast-undo-btn {
  color: rgba(30, 41, 59, 0.7);
}

html.dark .toast-undo-btn:hover {
  color: #1E293B;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* Dark mode overrides for hardcoded target row colours */

html.dark .tr-achieved,
html.dark .tr-easy     { background: #0E2D1C; border-color: #1E6B3A; }
html.dark .tr-moderate { background: #0E1F3D; border-color: #2352A0; }
html.dark .tr-hard     { background: #2A1D07; border-color: #8A5A10; }
html.dark .tr-vhard    { background: #2A1408; border-color: #A04018; }
html.dark .tr-impossible { background: #2A0E0E; border-color: #8A1E1E; }

html.dark .ts-achieved,
html.dark .ts-easy     { background: #1A5230; color: #6EE7B7; }
html.dark .ts-moderate { background: #1A3A8A; color: #93C5FD; }
html.dark .ts-hard     { background: #7A4010; color: #FCD34D; }
html.dark .ts-vhard    { background: #7A2E12; color: #FDBA74; }
html.dark .ts-impossible { background: #7A1E1E; color: #FCA5A5; }

html.dark .mc-first { background: #1E1B4B; color: #A5B4FC; }
html.dark .mc-upper { background: #1E3A5F; color: #93C5FD; }
html.dark .mc-lower { background: #2D1B00; color: #FCD34D; }
html.dark .mc-third { background: #2D1200; color: #FDBA74; }
html.dark .mc-fail  { background: #2D0707; color: #FCA5A5; }

html.dark .modal {
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.7);
}

html.dark .overlay {
  background: rgba(0, 0, 0, 0.7);
}

html.dark .input-unit-group .unit {
  color: #CBD5E1 !important;
  background: #1E2D42;
  border-left-color: #3D526A;
}

/* Toast undo button */

.toast-undo-btn {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  text-decoration: underline;
  padding: 0;
  margin-left: 6px;
}

.toast-undo-btn:hover {
  color: white;
}

/* Responsive */

@media (max-width: 960px) {
  .content-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .header-inner { padding: 0 16px; }

  .main { padding: 16px 16px 40px; gap: 16px; }

  .rwa-card { flex-basis: 100%; }

  .rwa-value { font-size: 48px; }

  .add-form { flex-wrap: wrap; }
}