/* =============================================
   tinh-thue.css — styles cho Công cụ tính thuế TADA
   ============================================= */

/* ── Variables ── */
:root {
  --calc-primary: #800020;
  --calc-accent: #d4af37;
  --calc-success: #2d8a4e;
  --calc-warning: #d97706;
  --calc-info: #2563eb;
  --calc-bg: #fdfbfa;
  --calc-card: #ffffff;
  --calc-border: #e8e0da;
  --calc-text: #1a1a1a;
  --calc-muted: #6b6b6b;
  --calc-radius: 16px;
  --calc-radius-sm: 8px;
  --calc-shadow: 0 2px 12px rgba(128, 0, 32, 0.06);
  --calc-shadow-hover: 0 4px 20px rgba(128, 0, 32, 0.12);
  --calc-transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Hero ── */
.calc-hero {
  padding: 90px 0 24px;
  text-align: center;
  background: linear-gradient(180deg, #fdfbfa 0%, #f6f1ed 100%);
}

.calc-hero-title {
  font-family: var(--font-sans);
  font-size: clamp(24px, 5vw, 40px);
  font-weight: 800;
  color: var(--calc-primary);
  line-height: 1.2;
  margin: 0 0 8px;
}

.calc-hero-desc {
  font-size: 14px;
  color: var(--calc-muted);
  line-height: 1.5;
  margin: 0;
}

.text-accent {
  color: var(--calc-primary);
}

@media (max-width: 480px) {
  .calc-hero { padding: 90px 0 16px; }
  .calc-hero-title { font-size: 22px; }
  .calc-hero-desc { font-size: 13px; }
}

@media (max-width: 768px) {
  .calc-hero { padding: 90px 0 20px; }
}

/* ── Deduction Box — compact inline ── */
.calc-deduction-box {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background: #f0fdf4;
  border: 1.5px solid #bbf7d0;
  border-radius: 12px;
  padding: 10px 20px;
  margin: 0 auto 16px;
}

.calc-deduction-box .calc-stepper {
  height: 36px;
}

.calc-deduction-box .calc-stepper-btn {
  width: 36px;
  height: 36px;
  font-size: 16px;
}

.calc-deduction-box .calc-stepper-input {
  width: 48px;
  height: 36px;
  font-size: 16px;
}

.calc-deduction-box .calc-hint {
  margin: 0;
  font-size: 11px;
}

@media (max-width: 480px) {
  .calc-deduction-box { flex-wrap: wrap; gap: 8px; }
}

#step2-forms {
  text-align: center;
}

#step2-forms .calc-source-form {
  text-align: left;
}

/* ── Calculator Section ── */
.calc-section {
  padding: 20px 0 60px;
}

/* ── Progress Bar ── */
.calc-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
  padding: 0 20px;
}

.calc-progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  position: relative;
  z-index: 1;
}

.calc-progress-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--calc-border);
  color: var(--calc-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  transition: var(--calc-transition);
}

.calc-progress-step.active .calc-progress-dot {
  background: var(--calc-primary);
  color: white;
  box-shadow: 0 0 0 4px rgba(128, 0, 32, 0.15);
}

.calc-progress-step.done .calc-progress-dot {
  background: var(--calc-success);
  color: white;
}

.calc-progress-label {
  font-size: 12px;
  color: var(--calc-muted);
  white-space: nowrap;
}

.calc-progress-step.active .calc-progress-label {
  color: var(--calc-primary);
  font-weight: 600;
}

.calc-progress-line {
  flex: 1;
  height: 2px;
  background: var(--calc-border);
  margin: 0 -8px;
  margin-bottom: 18px;
}

/* ── Steps ── */
.calc-step {
  display: none;
  animation: calcFadeIn 0.4s ease;
}

.calc-step.active {
  display: block;
}

@keyframes calcFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.calc-step-title {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  color: var(--calc-primary);
  text-align: center;
  margin: 0 0 8px;
}

.calc-step-hint {
  text-align: center;
  color: var(--calc-muted);
  font-size: 14px;
  margin: 0 0 30px;
}

/* ── Source Selection Cards ── */
.calc-source-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  max-width: 800px;
  margin: 0 auto 24px;
}

.calc-source-card {
  background: var(--calc-card);
  border: 2px solid var(--calc-border);
  border-radius: var(--calc-radius);
  padding: 16px;
  cursor: pointer;
  transition: var(--calc-transition);
  position: relative;
  overflow: hidden;
}

.calc-source-card:hover {
  border-color: var(--calc-accent);
  box-shadow: var(--calc-shadow);
  transform: translateY(-2px);
}

.calc-source-card.selected {
  border-color: var(--calc-primary);
  background: linear-gradient(135deg, #fdf2f4 0%, #fef9f0 100%);
  box-shadow: var(--calc-shadow-hover);
}

.calc-source-card.selected::after {
  content: "✓";
  position: absolute;
  top: 8px;
  right: 8px;
  width: 22px;
  height: 22px;
  background: var(--calc-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.calc-source-count {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--calc-accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 10px;
  line-height: 1;
}

.calc-source-remove {
  margin-left: auto;
  background: none;
  border: 1px solid #ddd;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  font-size: 12px;
  color: #999;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.calc-source-remove:hover {
  background: #fee;
  color: #c00;
  border-color: #c00;
}

.calc-add-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.calc-add-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  background: #f8f6f4;
  border: 1.5px dashed var(--calc-border);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--calc-primary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.calc-add-btn:hover {
  background: #fdf2f4;
  border-color: var(--calc-primary);
  border-style: solid;
}

/* ── Radio Group ── */
.calc-radio-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calc-radio {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border: 2px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  cursor: pointer;
  transition: var(--calc-transition);
}

.calc-radio:hover {
  border-color: var(--calc-accent);
}

.calc-radio:has(input:checked) {
  border-color: var(--calc-primary);
  background: linear-gradient(135deg, #fdf2f4 0%, #fef9f0 100%);
}

.calc-radio input[type="radio"] {
  margin-top: 2px;
  accent-color: var(--calc-primary);
}

.calc-radio-title {
  display: block;
  font-weight: 700;
  font-size: 14px;
  color: var(--calc-text);
}

.calc-radio-desc {
  display: block;
  font-size: 12px;
  color: var(--calc-muted);
  line-height: 1.4;
  margin-top: 2px;
}

.calc-source-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.calc-source-label {
  font-weight: 700;
  font-size: 14px;
  color: var(--calc-text);
  margin-bottom: 4px;
}

.calc-source-desc {
  font-size: 12px;
  color: var(--calc-muted);
  line-height: 1.4;
}

.calc-source-badge {
  display: inline-block;
  margin-top: 8px;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 100px;
  background: rgba(128, 0, 32, 0.08);
  color: var(--calc-primary);
}

/* ── Common Info ── */
.calc-common-info {
  max-width: 600px;
  margin: 0 auto 24px;
  padding: 20px;
  background: var(--calc-card);
  border-radius: var(--calc-radius);
  border: 1px solid var(--calc-border);
}

.calc-sub-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--calc-primary);
  margin: 0 0 16px;
}

/* ── Stepper ── */
.calc-stepper {
  display: flex;
  align-items: center;
  gap: 0;
  border: 2px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  overflow: hidden;
  width: fit-content;
}

.calc-stepper-btn {
  width: 44px;
  height: 44px;
  border: none;
  background: #f6f1ed;
  color: var(--calc-primary);
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--calc-transition);
}

.calc-stepper-btn:hover {
  background: var(--calc-primary);
  color: white;
}

.calc-stepper-input {
  width: 60px;
  height: 44px;
  border: none;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--calc-text);
  background: white;
  -moz-appearance: textfield;
}

.calc-stepper-input::-webkit-inner-spin-button,
.calc-stepper-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

.calc-hint {
  display: block;
  font-size: 12px;
  color: var(--calc-accent);
  font-weight: 600;
  margin-top: 6px;
}

/* ── Form Inputs ── */
.calc-form-group {
  margin-bottom: 16px;
}

.calc-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--calc-text);
  margin-bottom: 6px;
}

.calc-input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  border: 2px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  font-size: 16px;
  font-weight: 500;
  color: var(--calc-text);
  background: white;
  transition: var(--calc-transition);
  box-sizing: border-box;
}

.calc-input:focus {
  outline: none;
  border-color: var(--calc-accent);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15);
}

.calc-input::placeholder {
  color: #bbb;
}

.calc-input-group {
  position: relative;
}

.calc-input-suffix {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  color: var(--calc-muted);
  font-weight: 500;
}

.calc-input-group .calc-input {
  padding-right: 50px;
}

.calc-select {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  border: 2px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  font-size: 15px;
  color: var(--calc-text);
  background: white;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b6b6b' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}

.calc-select:focus {
  outline: none;
  border-color: var(--calc-accent);
}

/* ── Toggle Switch ── */
.calc-toggle-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.calc-toggle {
  position: relative;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.calc-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.calc-toggle-slider {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--calc-border);
  border-radius: 13px;
  cursor: pointer;
  transition: var(--calc-transition);
}

.calc-toggle-slider::before {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: var(--calc-transition);
}

.calc-toggle input:checked + .calc-toggle-slider {
  background: var(--calc-primary);
}

.calc-toggle input:checked + .calc-toggle-slider::before {
  transform: translateX(22px);
}

.calc-toggle-label {
  font-size: 14px;
  color: var(--calc-text);
}

.calc-toggle-hint {
  font-size: 12px;
  color: var(--calc-muted);
  margin-top: 2px;
}

/* ── Source Card in Step 2 ── */
.calc-source-form {
  max-width: 600px;
  margin: 0 auto 20px;
  padding: 24px;
  background: var(--calc-card);
  border-radius: var(--calc-radius);
  border: 1px solid var(--calc-border);
  box-shadow: var(--calc-shadow);
}

.calc-source-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--calc-border);
}

.calc-source-header-icon {
  font-size: 24px;
}

.calc-source-header-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--calc-primary);
}

.calc-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 480px) {
  .calc-form-row {
    grid-template-columns: 1fr;
  }
}

/* ── Live Badge ── */
.calc-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  margin-top: 8px;
  animation: calcPulse 2s ease infinite;
}

.calc-live-badge.exempt {
  background: #dcfce7;
  color: var(--calc-success);
}

.calc-live-badge.group {
  background: #fef3c7;
  color: var(--calc-warning);
}

.calc-live-badge.standard {
  background: #ede9fe;
  color: var(--calc-info);
}

@keyframes calcPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

/* ── Buttons ── */
.calc-step-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
  flex-wrap: wrap;
  position: relative;
  z-index: 10;
}

.calc-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: var(--calc-radius-sm);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--calc-transition);
  white-space: nowrap;
}

.calc-btn-next {
  background: var(--calc-primary);
  color: white;
}

.calc-btn-next:hover:not(:disabled) {
  background: #660019;
  transform: translateY(-1px);
}

.calc-btn-next:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.calc-btn-back {
  background: white;
  color: var(--calc-primary);
  border: 2px solid var(--calc-primary);
}

.calc-btn-back:hover {
  background: #fdf2f4;
}

.calc-btn-calc {
  background: linear-gradient(135deg, var(--calc-primary) 0%, #a00028 100%);
  color: white;
  font-size: 17px;
  padding: 14px 32px;
  box-shadow: 0 4px 14px rgba(128, 0, 32, 0.25);
}

.calc-btn-calc:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(128, 0, 32, 0.35);
}

.calc-btn-share {
  background: white;
  color: var(--calc-accent);
  border: 2px solid var(--calc-accent);
}

.calc-btn-share:hover {
  background: #fef9f0;
}

/* ── Result Card ── */
.calc-result {
  max-width: 700px;
  margin: 0 auto;
}

.calc-result-hero {
  text-align: center;
  padding: 32px 24px;
  background: linear-gradient(135deg, #fdf2f4 0%, #fef9f0 100%);
  border-radius: var(--calc-radius);
  border: 1px solid var(--calc-border);
  margin-bottom: 16px;
}

.calc-result-emoji {
  font-size: 48px;
  margin-bottom: 8px;
}

.calc-result-total {
  font-family: var(--font-serif);
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800;
  color: var(--calc-primary);
  margin-bottom: 4px;
}

.calc-result-label {
  font-size: 14px;
  color: var(--calc-muted);
}

.calc-result-effective {
  font-size: 16px;
  font-weight: 600;
  color: var(--calc-accent);
  margin-top: 8px;
}

.calc-result-saving {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  background: #dcfce7;
  color: var(--calc-success);
}

/* ── Result Tabs ── */
.calc-result-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--calc-border);
  margin-bottom: 0;
  overflow-x: auto;
}

.calc-result-tab {
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--calc-muted);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--calc-transition);
  white-space: nowrap;
}

.calc-result-tab.active {
  color: var(--calc-primary);
  border-bottom-color: var(--calc-primary);
}

.calc-result-tab:hover {
  color: var(--calc-primary);
}

.calc-result-panel {
  display: none;
  padding: 20px 0;
}

.calc-result-panel.active {
  display: block;
  animation: calcFadeIn 0.3s ease;
}

/* ── Breakdown Table ── */
.calc-breakdown {
  width: 100%;
  border-collapse: collapse;
}

.calc-breakdown tr {
  border-bottom: 1px solid var(--calc-border);
}

.calc-breakdown tr:last-child {
  border-bottom: none;
}

.calc-breakdown td {
  padding: 10px 0;
  font-size: 14px;
}

.calc-breakdown td:first-child {
  color: var(--calc-text);
}

.calc-breakdown td:last-child {
  text-align: right;
  font-weight: 600;
  font-family: var(--font-serif);
  color: var(--calc-primary);
}

.calc-breakdown tr.subtotal {
  border-top: 2px solid var(--calc-border);
  font-weight: 700;
}

.calc-breakdown tr.subtotal td {
  padding-top: 14px;
  font-size: 15px;
}

.calc-breakdown tr.formula-row td {
  padding: 2px 0 8px 16px;
  font-size: 12px;
  color: var(--calc-muted);
  font-style: italic;
  border-bottom: none;
}

.calc-breakdown .deduction {
  color: var(--calc-success);
}

.calc-breakdown .deduction td:last-child {
  color: var(--calc-success);
}

/* ── Tips / Advice ── */
.calc-tip {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  background: #f8f6f4;
  border-radius: var(--calc-radius-sm);
  margin-bottom: 10px;
  border-left: 3px solid var(--calc-accent);
}

.calc-tip-icon {
  font-size: 18px;
  flex-shrink: 0;
  line-height: 1.4;
}

.calc-tip-text {
  font-size: 14px;
  color: var(--calc-text);
  line-height: 1.5;
}

/* ── Procedure Steps ── */
.calc-proc-step {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--calc-border);
}

.calc-proc-step:last-child {
  border-bottom: none;
}

.calc-proc-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--calc-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.calc-proc-text {
  font-size: 14px;
  color: var(--calc-text);
  line-height: 1.5;
}

/* ── Calendar ── */
.calc-calendar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--calc-border);
}

.calc-calendar-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.calc-calendar-dot.green { background: var(--calc-success); }
.calc-calendar-dot.yellow { background: var(--calc-warning); }
.calc-calendar-dot.red { background: #ef4444; }

.calc-calendar-text {
  font-size: 14px;
  color: var(--calc-text);
}

/* ── Multi-source Summary ── */
.calc-source-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: white;
  border-radius: var(--calc-radius-sm);
  border: 1px solid var(--calc-border);
  margin-bottom: 10px;
}

.calc-source-summary-icon {
  font-size: 20px;
}

.calc-source-summary-info {
  flex: 1;
}

.calc-source-summary-label {
  font-size: 13px;
  color: var(--calc-muted);
}

.calc-source-summary-tax {
  font-size: 16px;
  font-weight: 700;
  color: var(--calc-primary);
}

/* ── Comparison Box (HKD) ── */
.calc-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0;
}

@media (max-width: 480px) {
  .calc-compare {
    grid-template-columns: 1fr;
  }
}

.calc-compare-box {
  padding: 16px;
  border-radius: var(--calc-radius-sm);
  border: 2px solid var(--calc-border);
  text-align: center;
}

.calc-compare-box.winner {
  border-color: var(--calc-success);
  background: #f0fdf4;
}

.calc-compare-label {
  font-size: 12px;
  color: var(--calc-muted);
  margin-bottom: 8px;
}

.calc-compare-amount {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 800;
  color: var(--calc-primary);
}

.calc-compare-tag {
  display: inline-block;
  margin-top: 8px;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
}

.calc-compare-tag.win {
  background: #dcfce7;
  color: var(--calc-success);
}

.calc-compare-tag.lose {
  background: #fef2f2;
  color: #ef4444;
}

/* ── Disclaimer ── */
.calc-disclaimer {
  padding: 20px 0;
}

.calc-disclaimer-box {
  padding: 16px 20px;
  background: #fef9f0;
  border: 1px solid #f5deb3;
  border-radius: var(--calc-radius-sm);
  font-size: 13px;
  color: var(--calc-muted);
  line-height: 1.5;
  max-width: 700px;
  margin: 0 auto;
}

/* ── Related Blogs ── */
.calc-related {
  padding: 40px 0;
}

.calc-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.calc-related-card {
  padding: 16px;
  background: var(--calc-card);
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  text-decoration: none;
  transition: var(--calc-transition);
}

.calc-related-card:hover {
  border-color: var(--calc-accent);
  box-shadow: var(--calc-shadow);
}

.calc-related-card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--calc-primary);
  margin-bottom: 4px;
}

.calc-related-card-desc {
  font-size: 12px;
  color: var(--calc-muted);
  line-height: 1.4;
}

/* ── Mobile Responsive ── */
@media (max-width: 768px) {
  .calc-hero { padding: 90px 0 24px; }
  .calc-hero-desc br { display: none; }
  .calc-source-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .calc-source-card { padding: 12px; }
  .calc-source-icon { font-size: 24px; }
  .calc-source-label { font-size: 13px; }
  .calc-source-desc { font-size: 11px; }
  .calc-progress-label { display: none; }
  .calc-progress-line { margin-bottom: 0; }
  .calc-result-hero { padding: 24px 16px; }
}

@media (max-width: 480px) {
  .calc-source-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .calc-source-card { padding: 10px; }
  .calc-step-actions { flex-direction: column; align-items: stretch; }
  .calc-btn { justify-content: center; }
}

/* ── Confetti Animation ── */
@keyframes calcConfetti {
  0% { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}

.calc-confetti {
  position: fixed;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  pointer-events: none;
  z-index: 9999;
  animation: calcConfetti 1.5s ease forwards;
}

/* ── Sector hint & badge ── */
.calc-input-hint {
  display: block;
  font-size: 12px;
  color: var(--calc-muted, #888);
  margin-top: 4px;
  font-style: italic;
}

.calc-badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
}