/* ═══════════════════════════════════════════════════════
   AutoValúa — Calculadora Profesional de Vehículos
   style.css
   Design: premium dealership tool, monochrome + accents
═══════════════════════════════════════════════════════ */

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

:root {
  --c-bg:        #f8f8f7;
  --c-white:     #ffffff;
  --c-black:     #111110;
  --c-grey-100:  #f2f2f0;
  --c-grey-200:  #e5e5e3;
  --c-grey-400:  #aaa9a6;
  --c-grey-600:  #6b6a67;
  --c-green:     #1a8c5c;
  --c-green-lt:  #e6f5ee;
  --c-red:       #c0392b;
  --c-red-lt:    #fbeae8;
  --c-amber:     #c17f24;
  --c-amber-lt:  #fdf3e3;
  --c-accent:    #111110;

  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;

  --shadow-card: 0 2px 12px rgba(0,0,0,.07);
  --shadow-lift: 0 8px 32px rgba(0,0,0,.13);

  --font-body:   'Helvetica Neue', Arial, sans-serif;

  --trans:       all .22s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-black);
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
}

/* ─── SITE HEADER ─── */
.site-header {
  background: var(--c-black);
  color: var(--c-white);
  padding: 0;
}

.header-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px 24px 22px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo-image {
  display: flex;
  align-items: center;
  width: 150px;
  flex-shrink: 0;
}

.logo-mark {
  width: 36px;
  height: 36px;
  background: var(--c-white);
  color: var(--c-black);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
  display: grid;
  place-items: center;
  letter-spacing: -.5px;
}

.logo-text {
  font-size: 20px;
  font-weight: 300;
  letter-spacing: -.2px;
}

.logo-text strong { font-weight: 700; }

.header-tagline {
  font-size: 13px;
  color: var(--c-grey-400);
  border-left: 1px solid #333;
  padding-left: 24px;
}

/* ─── PROGRESS BAR ─── */
.progress-shell {
  background: var(--c-white);
  border-bottom: 1px solid var(--c-grey-200);
  padding: 20px 24px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
}

.progress-steps {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 16px;
}

.step-dot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  cursor: default;
  flex-shrink: 0;
}

.dot-num {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid var(--c-grey-200);
  background: var(--c-white);
  color: var(--c-grey-400);
  font-size: 13px;
  font-weight: 700;
  display: grid;
  place-items: center;
  transition: var(--trans);
}

.dot-label {
  font-size: 11px;
  color: var(--c-grey-400);
  white-space: nowrap;
  transition: var(--trans);
}

.step-dot.active .dot-num {
  background: var(--c-black);
  border-color: var(--c-black);
  color: var(--c-white);
}

.step-dot.active .dot-label {
  color: var(--c-black);
  font-weight: 600;
}

.step-dot.done .dot-num {
  background: var(--c-green);
  border-color: var(--c-green);
  color: var(--c-white);
}

.step-dot.done .dot-num::after { content: '✓'; }
.step-dot.done .dot-num > span { display: none; }

.step-line {
  flex: 1;
  height: 2px;
  background: var(--c-grey-200);
  margin-bottom: 18px;
  transition: var(--trans);
}

.step-line.done { background: var(--c-green); }

.progress-bar-track {
  max-width: 880px;
  margin: 0 auto;
  height: 3px;
  background: var(--c-grey-200);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--c-black);
  border-radius: 2px;
  transition: width .4s cubic-bezier(.4,0,.2,1);
  width: 25%;
}

/* ─── MAIN CONTENT ─── */
.main-content {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* ─── STEP SECTIONS ─── */
.step-section {
  display: none;
  animation: fadeSlide .3s ease;
}

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

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

.section-header {
  margin-bottom: 28px;
}

.section-header h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.4px;
  margin-bottom: 4px;
}

.section-header p {
  font-size: 14px;
  color: var(--c-grey-600);
}

/* ─── CARD GRID ─── */
.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

@media (max-width: 600px) {
  .card-grid { grid-template-columns: 1fr; }
}

.field-group--wide { grid-column: 1 / -1; }

/* ─── FIELD GROUP ─── */
.field-group { display: flex; flex-direction: column; gap: 6px; }

.field-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--c-grey-600);
  text-transform: uppercase;
  letter-spacing: .5px;
}

/* ─── INPUTS ─── */
.field-group input[type="text"],
.field-group input[type="number"] {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--c-grey-200);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-family: var(--font-body);
  background: var(--c-white);
  color: var(--c-black);
  outline: none;
  transition: var(--trans);
  -moz-appearance: textfield;
}

.field-group input[type="number"]::-webkit-inner-spin-button,
.field-group input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

.field-group input:focus {
  border-color: var(--c-black);
  box-shadow: 0 0 0 3px rgba(17,17,16,.08);
}

.field-group input.error {
  border-color: var(--c-red);
  box-shadow: 0 0 0 3px var(--c-red-lt);
}

.field-group input[readonly] {
  background: var(--c-grey-100);
  color: var(--c-grey-600);
  cursor: not-allowed;
}

.field-group input[readonly]:focus {
  border-color: var(--c-grey-200);
  box-shadow: none;
}

/* ─── PREFIX INPUT ─── */
.input-prefix-wrap {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--c-grey-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--c-white);
  transition: var(--trans);
}

.input-prefix-wrap:focus-within {
  border-color: var(--c-black);
  box-shadow: 0 0 0 3px rgba(17,17,16,.08);
}

.input-prefix-wrap.error {
  border-color: var(--c-red);
  box-shadow: 0 0 0 3px var(--c-red-lt);
}

.input-prefix {
  padding: 12px 12px 12px 16px;
  font-size: 15px;
  color: var(--c-grey-400);
  font-weight: 600;
  user-select: none;
}

.input-prefix-wrap input {
  border: none !important;
  box-shadow: none !important;
  padding: 12px 16px 12px 4px;
  flex: 1;
}

/* ─── SELECT ─── */
.select-wrap {
  position: relative;
}

.select-wrap select {
  width: 100%;
  padding: 12px 40px 12px 16px;
  border: 1.5px solid var(--c-grey-200);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-family: var(--font-body);
  background: var(--c-white);
  color: var(--c-black);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  transition: var(--trans);
}

.select-wrap select:focus {
  border-color: var(--c-black);
  box-shadow: 0 0 0 3px rgba(17,17,16,.08);
}

.select-wrap select.error { border-color: var(--c-red); }

.select-arrow {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--c-grey-400);
  font-size: 16px;
}

/* ─── SLIDERS CARD ─── */
.sliders-card {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-grey-200);
  padding: 28px 32px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.slider-row { display: flex; flex-direction: column; gap: 8px; }

.slider-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-black);
}

.slider-value {
  min-width: 32px;
  height: 32px;
  background: var(--c-black);
  color: var(--c-white);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  display: grid;
  place-items: center;
  transition: var(--trans);
}

/* Range slider */
.condition-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--c-black) 0%, var(--c-black) 50%, var(--c-grey-200) 50%);
  outline: none;
  cursor: pointer;
  transition: background .1s;
}

.condition-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--c-white);
  border: 2.5px solid var(--c-black);
  box-shadow: 0 2px 8px rgba(0,0,0,.18);
  cursor: grab;
  transition: var(--trans);
}

.condition-slider::-webkit-slider-thumb:active { cursor: grabbing; transform: scale(1.15); }

.condition-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--c-white);
  border: 2.5px solid var(--c-black);
  box-shadow: 0 2px 8px rgba(0,0,0,.18);
  cursor: grab;
}

.slider-track-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--c-grey-400);
}

/* Condition average */
.condition-average {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--c-grey-200);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-grey-600);
}

.average-badge {
  background: var(--c-grey-100);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-black);
  transition: var(--trans);
}

/* ─── NAV CONTROLS ─── */
.nav-controls {
  display: flex;
  gap: 12px;
  margin-top: 36px;
  justify-content: flex-end;
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border: 1.5px solid transparent;
  outline: none;
  transition: var(--trans);
  letter-spacing: .1px;
}

.btn--primary {
  background: var(--c-black);
  color: var(--c-white);
  border-color: var(--c-black);
}

.btn--primary:hover { background: #2a2a28; }

.btn--ghost {
  background: transparent;
  color: var(--c-black);
  border-color: var(--c-grey-200);
}

.btn--ghost:hover { background: var(--c-grey-100); }

.btn--ghost:disabled {
  opacity: .3;
  cursor: not-allowed;
}

.btn--calc {
  background: var(--c-green);
  color: var(--c-white);
  border-color: var(--c-green);
  font-size: 15px;
  padding: 14px 28px;
}

.btn--calc:hover { background: #157a50; }

.btn--wide { width: 100%; justify-content: center; margin-top: 16px; }

.hidden { display: none !important; }

/* ─── RESULTS ─── */
.results-section {
  animation: fadeSlide .4s ease;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}

.results-vehicle-name {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.5px;
}

/* Badge */
.results-badge {
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .3px;
}

.results-badge.badge--good {
  background: var(--c-green-lt);
  color: var(--c-green);
  border: 1px solid #a3d9c0;
}

.results-badge.badge--fair {
  background: var(--c-amber-lt);
  color: var(--c-amber);
  border: 1px solid #e8c97a;
}

.results-badge.badge--over {
  background: var(--c-red-lt);
  color: var(--c-red);
  border: 1px solid #e8a9a3;
}

/* Price cards */
.price-cards {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 16px;
  margin-bottom: 28px;
}

@media (max-width: 640px) {
  .price-cards { grid-template-columns: 1fr; }
}

.price-card {
  background: var(--c-white);
  border: 1px solid var(--c-grey-200);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--trans);
}

.price-card:hover { box-shadow: var(--shadow-lift); transform: translateY(-2px); }

.price-card__label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--c-grey-400);
  margin-bottom: 10px;
}

.price-card__value {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 6px;
}

.price-card__note {
  font-size: 11px;
  color: var(--c-grey-400);
}

/* Quick — subtle red tint */
.price-card--quick { border-top: 3px solid var(--c-red); }
.price-card--quick .price-card__value { color: var(--c-red); }

/* Recommended — prominent */
.price-card--recommended {
  border-top: 3px solid var(--c-black);
  background: var(--c-black);
  color: var(--c-white);
}

.price-card--recommended .price-card__label { color: var(--c-grey-400); }
.price-card--recommended .price-card__value { color: var(--c-white); }
.price-card--recommended .price-card__note  { color: var(--c-grey-400); }

.recommended-star {
  position: absolute;
  top: 12px;
  right: 14px;
  font-size: 16px;
  color: var(--c-grey-400);
}

/* Premium — green accent */
.price-card--premium { border-top: 3px solid var(--c-green); }
.price-card--premium .price-card__value { color: var(--c-green); }

/* ─── FACTORS CARD ─── */
.factors-card {
  background: var(--c-white);
  border: 1px solid var(--c-grey-200);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
}

.factors-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--c-black);
}

.factors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.factor-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  background: var(--c-grey-100);
  border-radius: var(--radius-sm);
}

.factor-item__name {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .4px;
  color: var(--c-grey-600);
}

.factor-item__value {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-black);
}

.factor-item__value.positive { color: var(--c-green); }
.factor-item__value.negative { color: var(--c-red); }

.total-adjustment {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--c-grey-200);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-grey-600);
}

.adjustment-value {
  font-size: 20px;
  font-weight: 800;
  color: var(--c-black);
}

/* ─── SITE FOOTER ─── */
.site-footer {
  text-align: center;
  padding: 24px;
  font-size: 12px;
  color: var(--c-grey-400);
  border-top: 1px solid var(--c-grey-200);
  background: var(--c-white);
}

/* ─── ERROR MESSAGES ─── */
.error-msg {
  font-size: 11px;
  color: var(--c-red);
  margin-top: 4px;
  display: none;
}

.error-msg.visible { display: block; }