/* ═══════════════════════════════════════════════════════
   CALCULADORA DE CASHBACK — Meu Posto
   Editorial brutalist industrial design
   ═══════════════════════════════════════════════════════ */

/* ── Design tokens ── */
:root {
  --bg-void: #0a0a0a;
  --bg-deep: #111111;
  --bg-panel: #1a1a1a;
  --bg-elevated: #242424;

  --text-bright: #f0f0f0;
  --text-primary: #e0e0e0;
  --text-secondary: #888888;
  --text-dim: #555555;

  --accent: #d4ff00;
  --accent-dim: rgba(212, 255, 0, 0.15);
  --accent-glow: rgba(212, 255, 0, 0.4);

  --success: #00ff88;
  --success-dim: rgba(0, 255, 136, 0.12);

  --warning: #ff6b35;

  --border: #2a2a2a;
  --border-bright: #3a3a3a;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --radius-sm: 4px;
  --radius-md: 6px;

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset & base ── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background: var(--bg-void);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Background effects ── */
.bg-gradient {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 100% 60% at 50% 0%, rgba(212, 255, 0, 0.03), transparent 60%),
    radial-gradient(ellipse 80% 50% at 100% 100%, rgba(0, 255, 136, 0.02), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.bg-texture {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ── Header ── */
.header {
  position: relative;
  z-index: 1;
  padding: 80px 48px 60px;
  max-width: 1400px;
  margin: 0 auto;
}

.header-kicker {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  animation: fade-in 0.6s ease forwards;
  animation-delay: 0.1s;
  opacity: 0;
}

.header-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 6vw, 7rem);
  font-weight: 900;
  color: var(--text-bright);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  animation: slide-up 0.8s ease forwards;
  animation-delay: 0.2s;
  opacity: 0;
}

.header-rule {
  width: 80px;
  height: 4px;
  background: var(--accent);
  margin-bottom: 24px;
  animation: scale-in 0.6s ease forwards;
  animation-delay: 0.4s;
  transform-origin: left;
  opacity: 0;
}

.header-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 500px;
  animation: fade-in 0.6s ease forwards;
  animation-delay: 0.5s;
  opacity: 0;
}

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(40px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scaleX(0);
  }

  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

/* ── Calculator layout ── */
.calculator {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 48px 80px;
  background: var(--border);
}

/* ── Panel ── */
.panel {
  background: var(--bg-panel);
  padding: 40px;
  animation: panel-in 0.6s ease forwards;
}

.panel-inputs {
  animation-delay: 0.3s;
}

.panel-outputs {
  animation-delay: 0.4s;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.panel-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.panel-number {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 2px;
}

.panel-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-bright);
  letter-spacing: -0.02em;
}

/* ── Section headers ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-tag {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 14px;
  background: var(--accent-dim);
  border: 1px solid rgba(212, 255, 0, 0.3);
}

.section-tag.secondary {
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border-color: var(--border-bright);
}

.section-tag.tertiary {
  color: var(--success);
  background: var(--success-dim);
  border-color: rgba(0, 255, 136, 0.3);
}

/* ── Toggle button ── */
.toggle-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border-bright);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.toggle-btn:hover {
  border-color: var(--text-dim);
  color: var(--text-primary);
}

.toggle-btn svg {
  transition: transform var(--transition);
}

.toggle-btn[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

/* ── Collapsible ── */
.collapsible {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
}

.collapsible.open {
  max-height: 400px;
  opacity: 1;
  margin-bottom: 24px;
}

/* ── Input stack ── */
.input-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 28px;
}

.input-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-block.compact {
  gap: 6px;
}

.input-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.input-row {
  display: flex;
  align-items: center;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}

.input-row:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 0 20px var(--accent-dim);
}

.input-number {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  padding: 16px 20px;
  min-width: 0;
}

.input-block.compact .input-number {
  font-size: 1.1rem;
  padding: 12px 16px;
}

.input-number::-webkit-outer-spin-button,
.input-number::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.input-number[type=number] {
  -moz-appearance: textfield;
}

.input-unit {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dim);
  padding: 0 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-left: 1px solid var(--border);
  background: var(--bg-panel);
  display: flex;
  align-items: center;
  height: 100%;
  min-height: 54px;
}

.input-block.compact .input-unit {
  min-height: 44px;
  font-size: 0.65rem;
  padding: 0 12px;
}

.input-desc {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 400;
}

/* ── Input grid ── */
.input-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

/* ── Calculate button ── */
.calc-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  width: 100%;
  padding: 20px 32px;
  margin-top: 8px;
  background: var(--accent);
  border: none;
  color: var(--bg-void);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.calc-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.calc-btn:hover::before {
  transform: translateX(100%);
}

.calc-btn:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px var(--accent-glow);
}

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

.btn-arrow {
  transition: transform var(--transition);
}

.calc-btn:hover .btn-arrow {
  transform: translateX(6px);
}

/* ── Results panel ── */
.panel-outputs {
  display: flex;
  flex-direction: column;
}

/* ── Metrics grid ── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  margin-bottom: 32px;
  background: var(--border);
}

/* ── Metric card ── */
.metric {
  background: var(--bg-panel);
  padding: 24px;
  position: relative;
  transition: var(--transition);
}

.metric::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--text-dim);
  transition: height 0.4s ease;
}

.metric.has-value::after {
  height: 100%;
}

.metric-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 6px;
  line-height: 1;
}

.metric-sub {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.metric.metric-primary {
  background: var(--accent-dim);
}

.metric.metric-primary::after {
  background: var(--accent);
}

.metric.metric-primary .metric-value {
  color: var(--accent);
}

.metric.metric-success .metric-value {
  color: var(--success);
}

.metric.metric-success::after {
  background: var(--success);
}

/* ── Pulse animation ── */
@keyframes metric-pop {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.02);
  }

  100% {
    transform: scale(1);
  }
}

.metric.pop {
  animation: metric-pop 0.3s ease;
}

/* ── Breakdown panel ── */
.breakdown-panel {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  padding: 28px;
  margin-bottom: 2px;
}

.breakdown-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.breakdown-icon {
  color: var(--accent);
}

.breakdown-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-panel);
  transition: background var(--transition);
}

.breakdown-row:hover {
  background: var(--bg-elevated);
}

.breakdown-row.breakdown-sub {
  border-top: 1px dashed var(--border);
  margin-top: 8px;
  padding-top: 16px;
}

.breakdown-row.breakdown-pos .breakdown-val {
  color: var(--success);
}

.breakdown-row.breakdown-total {
  background: var(--accent-dim);
  margin-top: 8px;
}

.breakdown-row.breakdown-total .breakdown-val {
  color: var(--accent);
  font-size: 1.1rem;
}

.breakdown-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.breakdown-val {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ── Comparison bars ── */
.comparison-panel {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  padding: 28px;
}

.bars {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.bar-line {
  display: grid;
  grid-template-columns: 140px 1fr 120px;
  align-items: center;
  gap: 16px;
}

.bar-name {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-align: right;
}

.bar-track {
  height: 36px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  min-width: 4px;
}

.bar-fill::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: inherit;
  filter: brightness(1.3);
}

.bar-desconto {
  background: linear-gradient(90deg, var(--warning), #ff8c5a);
}

.bar-cashback {
  background: linear-gradient(90deg, #00cc6a, var(--success));
}

.bar-num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ── Footer ── */
.footer {
  position: relative;
  z-index: 1;
  padding: 40px 48px;
  max-width: 1400px;
  margin: 0 auto;
}

.footer-line {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin-bottom: 24px;
}

.footer p {
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 1px;
}

/* ═══════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════ */

@media (max-width: 1100px) {
  .calculator {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .header {
    padding: 60px 32px 40px;
  }

  .calculator {
    padding: 0 32px 60px;
  }
}

@media (max-width: 768px) {
  .header {
    padding: 40px 20px 32px;
  }

  .header-title {
    font-size: 3rem;
  }

  .calculator {
    padding: 0 20px 40px;
  }

  .panel {
    padding: 28px 20px;
  }

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

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

  .metric-value {
    font-size: 1.5rem;
  }

  .bar-line {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .bar-name {
    text-align: left;
  }

  .bar-track {
    height: 28px;
  }

  .bar-num {
    font-size: 0.8rem;
  }

  .footer {
    padding: 32px 20px;
  }
}

@media (max-width: 480px) {
  .header {
    padding: 32px 16px 24px;
  }

  .header-kicker {
    font-size: 0.6rem;
    letter-spacing: 3px;
  }

  .header-title {
    font-size: 2.5rem;
  }

  .panel {
    padding: 20px 16px;
  }

  .panel-title {
    font-size: 1.4rem;
  }

  .input-number {
    font-size: 1.25rem;
    padding: 14px 16px;
  }

  .input-stack {
    gap: 20px;
  }

  .metric {
    padding: 18px;
  }

  .metric-value {
    font-size: 1.3rem;
  }

  .breakdown-panel,
  .comparison-panel {
    padding: 20px 16px;
  }

  .breakdown-title {
    font-size: 0.75rem;
  }
}