/* ═══════════════════════════════════════════════════════
   CALCULADORA DE CASHBACK — Meu Posto
   Premium dark theme with glassmorphism
   ═══════════════════════════════════════════════════════ */

/* ── Design tokens ── */
:root {
  --purple-main: #622d8d;
  --purple-dark: #4b226d;
  --purple-deep: #2d0f4e;
  --purple-extra-dark: #1a0a30;
  --purple-bg: #0e0620;
  --purple-surface: #1c0e38;
  --purple-border: rgba(98, 45, 141, 0.3);
  --purple-glow: rgba(98, 45, 141, 0.5);

  --gold: #FF9D00;
  --gold-dark: #b38600;
  --gold-mid: #d9ad26;
  --gold-light: #fff078;
  --gold-glow: rgba(255, 157, 0, 0.3);

  --green: #00cc99;
  --green-dark: #00a87d;
  --green-glow: rgba(0, 204, 153, 0.3);

  --red-soft: #ff6b6b;

  --text-white: #f5f0ff;
  --text-muted: #a89cc4;
  --text-dim: #73648f;

  --glass-bg: rgba(28, 14, 56, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s 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: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--purple-bg);
  color: var(--text-white);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ── Floating particles ── */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, var(--purple-glow), transparent 70%);
  animation: float-particle linear infinite;
  opacity: 0;
}

@keyframes float-particle {
  0% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% {
    transform: translateY(-10vh) scale(1);
    opacity: 0;
  }
}

/* ── Header ── */
.header {
  position: relative;
  z-index: 1;
  padding: 50px 24px 30px;
  text-align: center;
  background: linear-gradient(180deg, rgba(98, 45, 141, 0.15) 0%, transparent 100%);
}

.header-inner {
  max-width: 700px;
  margin: 0 auto;
}

.logo-area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}

.logo-icon {
  font-size: 1.8rem;
}

.logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.header-title {
  font-size: 2.75rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--gold-light), var(--gold), var(--gold-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
  margin-bottom: 12px;
  animation: shimmer-title 3s ease-in-out infinite;
}

@keyframes shimmer-title {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.2); }
}

.header-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── Calculator layout ── */
.calculator-container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 28px 60px;
}

/* ── Glass card ── */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
  padding: 32px;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--glass-border);
}

.card-icon {
  font-size: 1.5rem;
}

.card-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-white);
}

/* ── Input group labels ── */
.input-group-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  margin-top: 8px;
}

.group-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 4px 12px;
  border-radius: 20px;
}

.group-badge.primary {
  background: rgba(255, 157, 0, 0.15);
  color: var(--gold);
  border: 1px solid rgba(255, 157, 0, 0.25);
}

.group-badge.secondary {
  background: rgba(98, 45, 141, 0.2);
  color: var(--text-muted);
  border: 1px solid var(--purple-border);
}

.group-badge.advanced {
  background: rgba(0, 204, 153, 0.1);
  color: var(--green);
  border: 1px solid rgba(0, 204, 153, 0.2);
}

/* ── Toggle buttons ── */
.toggle-defaults {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.toggle-defaults:hover {
  border-color: var(--purple-border);
  color: var(--text-muted);
  background: rgba(98, 45, 141, 0.1);
}

.toggle-chevron {
  font-size: 0.6rem;
  transition: transform 0.3s ease;
}

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

/* ── Collapsible panels ── */
.defaults-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.3s ease,
              margin 0.3s ease;
  opacity: 0;
  margin-bottom: 0;
}

.defaults-panel.open {
  max-height: 400px;
  opacity: 1;
  margin-bottom: 16px;
}

/* ── Input rows ── */
.input-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

/* ── Input fields ── */
.input-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

.input-wrapper {
  display: flex;
  align-items: center;
  background: rgba(14, 6, 32, 0.7);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  transition: var(--transition);
  position: relative;
}

.input-wrapper:focus-within {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(255, 157, 0, 0.12);
}

.input-prefix {
  font-size: 1rem;
  margin-right: 8px;
  flex-shrink: 0;
}

.input-suffix {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 600;
  margin-left: 4px;
  flex-shrink: 0;
}

.input-field input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-white);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 12px 0;
  font-family: inherit;
  -moz-appearance: textfield;
}

.input-field.compact input {
  padding: 10px 0;
  font-size: 0.95rem;
}

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

.input-hint {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-weight: 500;
}

/* ── Calculate button ── */
.btn-calculate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 16px 24px;
  margin-top: 12px;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold), var(--gold-mid));
  background-size: 200% 200%;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--purple-extra-dark);
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px var(--gold-glow);
  animation: btn-gradient 4s ease infinite;
  position: relative;
  overflow: hidden;
}

.btn-calculate::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.3), transparent);
  transform: skewX(-25deg);
  animation: btn-shimmer 3s infinite;
}

@keyframes btn-gradient {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes btn-shimmer {
  0% { left: -100%; }
  60% { left: 150%; }
  100% { left: 150%; }
}

.btn-calculate:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 157, 0, 0.45);
  filter: brightness(1.1);
}

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

.btn-icon {
  font-size: 1.3rem;
  transition: transform 0.3s ease;
}

.btn-calculate:hover .btn-icon {
  transform: translateX(4px);
}

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

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

/* ── Result cards ── */
.result-card {
  background: rgba(14, 6, 32, 0.5);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.result-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--purple-main), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.result-card.has-value::before {
  opacity: 1;
}

.result-card.highlight-card::before {
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.result-card.savings-card::before {
  background: linear-gradient(90deg, transparent, var(--green), transparent);
}

.result-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.result-value {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 6px;
  line-height: 1.2;
  transition: color 0.3s ease;
}

.highlight-card .result-value {
  color: var(--gold);
}

.savings-card .result-value {
  color: var(--green);
}

.result-desc {
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 1.4;
}

/* ── Pulse animation on update ── */
@keyframes result-pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.result-card.pop {
  animation: result-pop 0.35s ease;
}

/* ── Breakdown ── */
.breakdown-section {
  background: rgba(14, 6, 32, 0.4);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 24px;
  margin-bottom: 20px;
}

.breakdown-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breakdown-icon {
  font-size: 1rem;
}

.breakdown-items {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.breakdown-row:hover {
  background: rgba(255, 255, 255, 0.03);
}

.breakdown-row.sub {
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  padding-top: 12px;
  margin-top: 4px;
}

.breakdown-row.total {
  background: rgba(255, 157, 0, 0.08);
  border: 1px solid rgba(255, 157, 0, 0.15);
  margin-top: 8px;
}

.breakdown-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.breakdown-value {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-white);
  font-variant-numeric: tabular-nums;
}

.breakdown-value.green {
  color: var(--green);
}

/* ── Comparison bars ── */
.comparison-bar-section {
  background: rgba(14, 6, 32, 0.4);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 24px;
}

.comparison-bars {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.bar-row {
  display: grid;
  grid-template-columns: 120px 1fr 100px;
  align-items: center;
  gap: 12px;
}

.bar-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: right;
}

.bar-track {
  height: 28px;
  background: rgba(14, 6, 32, 0.6);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.bar-fill {
  height: 100%;
  border-radius: 14px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.bar-desconto {
  background: linear-gradient(90deg, var(--red-soft), #ff8787);
}

.bar-cashback {
  background: linear-gradient(90deg, var(--green-dark), var(--green));
}

.bar-value {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-white);
  font-variant-numeric: tabular-nums;
}

/* ── Footer ── */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 30px 24px;
  color: var(--text-dim);
  font-size: 0.82rem;
  border-top: 1px solid var(--glass-border);
}

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

@media (max-width: 1100px) {
  .calculator-container {
    grid-template-columns: 1fr;
    max-width: 720px;
  }

  .header-title {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  .header {
    padding: 36px 20px 20px;
  }

  .header-title {
    font-size: 1.75rem;
  }

  .header-subtitle {
    font-size: 0.95rem;
  }

  .calculator-container {
    padding: 16px;
    gap: 20px;
  }

  .card {
    padding: 24px 18px;
  }

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

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

  .bar-row {
    grid-template-columns: 90px 1fr 80px;
    gap: 8px;
  }

  .bar-label {
    font-size: 0.7rem;
  }

  .result-value {
    font-size: 1.35rem;
  }
}

@media (max-width: 480px) {
  .header-title {
    font-size: 1.5rem;
  }

  .card {
    padding: 18px 14px;
    border-radius: 12px;
  }

  .result-card {
    padding: 14px;
  }

  .result-value {
    font-size: 1.2rem;
  }

  .breakdown-section,
  .comparison-bar-section {
    padding: 16px 12px;
  }

  .bar-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

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