/* ============================================
   TechCalcPro — Estilos
   ============================================ */

/* ----- Variables ----- */
:root {
  --bg-main: #0c0d0e;
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-bg-hover: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-light: rgba(255, 255, 255, 0.04);

  --text-primary: #ffffff;
  --text-secondary: #a3a8ac;
  --text-muted: #6b7280;

  --accent-color: #00e5ff;
  --accent-hover: #00b2c7;
  --accent-glow: rgba(0, 229, 255, 0.3);
  --accent-subtle: rgba(0, 229, 255, 0.08);
  --accent-border: rgba(0, 229, 255, 0.25);

  --amber: #f59e0b;
  --red: #ef4444;
  --red-subtle: rgba(239, 68, 68, 0.15);

  --radius-sm: 8px;
  --radius-item: 16px;
  --radius-card: 24px;
  --radius-pill: 50px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 24px rgba(0, 229, 255, 0.15);

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-main);
  min-height: 100vh;
}

/* ----- Container ----- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ----- Header ----- */
.header {
  border-bottom: 1px solid var(--glass-border);
  background: var(--bg-main);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-logo {
  height: 44px;
  width: auto;
  object-fit: contain;
  display: block;
}

.header__tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ----- Layout ----- */
.main {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 2rem;
  padding-top: 2rem;
  padding-bottom: 3rem;
  align-items: start;
}

/* ----- Form ----- */
.form-group {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group:focus-within {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 1px var(--accent-border), 0 0 24px var(--accent-glow);
}

.form-group__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  background: var(--accent-subtle);
  color: var(--accent-color);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  border: 1px solid var(--accent-border);
}

.form-group__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.form-group__note {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: auto;
}

/* ----- Subheading ----- */
.subheading {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ----- Chip Group (radio pill buttons) ----- */
.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--glass-border);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.chip:hover {
  border-color: var(--accent-border);
  background: var(--glass-bg-hover);
}

.chip input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.chip:has(input:checked) {
  border-color: var(--accent-color);
  background: var(--accent-subtle);
  box-shadow: 0 0 0 1px var(--accent-color), 0 0 12px var(--accent-glow);
}

.chip__text {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.chip__text small {
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 0.25rem;
  font-size: 0.75rem;
}

.chip:has(input:checked) .chip__text {
  color: var(--text-primary);
}

.chip:has(input:checked) .chip__text small {
  color: var(--accent-color);
}

.chip--decision.chip--ahora {
  border-color: var(--accent-border);
  background: var(--accent-subtle);
}

.chip--decision.chip--ahora:has(input:checked) {
  border-color: var(--accent-color);
  background: var(--accent-subtle);
  box-shadow: 0 0 0 1px var(--accent-color), 0 0 16px var(--accent-glow);
}

.chip--cost {
  border-color: var(--glass-border-light);
}

/* ----- Split Row ----- */
.split-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.split-row__item {
  min-width: 0;
}

/* ----- Product Grid ----- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-item);
  border: 1.5px solid var(--glass-border);
  background: var(--glass-bg);
  cursor: pointer;
  transition: all 0.2s ease;
}

.product-card:hover {
  border-color: var(--accent-border);
  background: var(--glass-bg-hover);
  transform: translateY(-1px);
}

.product-card input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.product-card:has(input:checked) {
  border-color: var(--accent-color);
  background: var(--accent-subtle);
  box-shadow: 0 0 0 1px var(--accent-color), 0 0 24px var(--accent-glow);
}

.product-card__name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.3rem;
  line-height: 1.3;
}

.product-card:has(input:checked) .product-card__name {
  color: var(--text-primary);
}

.product-card__price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.product-card:has(input:checked) .product-card__price {
  color: var(--accent-color);
}

/* ----- Cost Block ----- */
.cost-block {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--glass-border-light);
}

.cost-block:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.cost-block__title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.cost-block__note {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ----- Checkbox Grid ----- */
.checkbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.checkbox-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-item);
  border: 1.5px solid var(--glass-border);
  background: var(--glass-bg);
  cursor: pointer;
  transition: all 0.2s ease;
}

.checkbox-card:hover {
  border-color: var(--accent-border);
  background: var(--glass-bg-hover);
}

.checkbox-card input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-card:has(input:checked) {
  border-color: var(--accent-color);
  background: var(--accent-subtle);
}

.checkbox-card__check {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 4px;
  border: 2px solid var(--text-muted);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.checkbox-card:has(input:checked) .checkbox-card__check {
  background: var(--accent-color);
  border-color: var(--accent-color);
}

.checkbox-card:has(input:checked) .checkbox-card__check::after {
  content: '';
  width: 0.3rem;
  height: 0.55rem;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translateY(-1px);
}

.checkbox-card__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.checkbox-card__name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.checkbox-card:has(input:checked) .checkbox-card__name {
  color: var(--text-primary);
}

.checkbox-card__sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

.checkbox-card__price {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  flex-shrink: 0;
}

.checkbox-card:has(input:checked) .checkbox-card__price {
  color: var(--accent-color);
}

/* ----- Radio List ----- */
.radio-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.radio-row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-item);
  border: 1.5px solid var(--glass-border-light);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.radio-row:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border);
}

.radio-row input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-row:has(input:checked) {
  border-color: var(--accent-color);
  background: var(--accent-subtle);
  box-shadow: 0 0 0 1px var(--accent-border);
}

.radio-row__check {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  border: 2px solid var(--text-muted);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.radio-row:has(input:checked) .radio-row__check {
  border-color: var(--accent-color);
}

.radio-row:has(input:checked) .radio-row__check::after {
  content: '';
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent-color);
}

.radio-row__info {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.radio-row__name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.radio-row:has(input:checked) .radio-row__name {
  color: var(--text-primary);
}

.radio-row__sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.05rem;
}

.radio-row__price {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  flex-shrink: 0;
}

.radio-row:has(input:checked) .radio-row__price {
  color: var(--accent-color);
}

/* ----- Custom Input ----- */
.custom-input {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem 0.6rem 2.85rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.number-input {
  width: 5rem;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.number-input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

/* ----- Warning Banner ----- */
.warning-banner {
  margin-top: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--amber);
  font-size: 0.78rem;
  line-height: 1.5;
}

.warning-container {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.warning-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid;
  font-size: 0.78rem;
  line-height: 1.5;
}

.warning-item__icon {
  flex-shrink: 0;
  font-size: 0.85rem;
  line-height: 1.5;
}

.warning-item__text {
  flex: 1;
}

.warning-item--advertencia {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.2);
  color: var(--amber);
}

.warning-item--informacion {
  background: rgba(0, 229, 255, 0.06);
  border-color: rgba(0, 229, 255, 0.15);
  color: var(--accent-color);
}

.warning-item--sugerencia {
  background: rgba(16, 185, 129, 0.06);
  border-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

/* ============================================
   SUMMARY CARD
   ============================================ */
.summary-column {
  position: sticky;
  top: 6rem;
}

.summary-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  overflow: hidden;
}

.summary-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--glass-border);
  letter-spacing: -0.01em;
}

.summary-card__body {
  min-height: 200px;
}

/* Placeholder */
.summary-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2.5rem 1rem;
  gap: 0.75rem;
}

.placeholder-icon {
  width: 3rem;
  height: 3rem;
  color: var(--text-muted);
  opacity: 0.4;
}

.placeholder-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 280px;
  line-height: 1.5;
}

/* Summary Items */
.summary-product {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.summary-label {
  grid-column: 1 / -1;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.15rem;
}

.summary-product .summary-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.summary-product .summary-price {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-color);
  text-align: right;
}

.summary-divider {
  height: 1px;
  background: var(--glass-border);
  margin: 0.7rem 0;
}

.summary-divider--thick {
  height: 2px;
  background: var(--accent-border);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* Factors */
.summary-factors {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.factor-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-secondary);
  padding: 0.15rem 0;
}

.factor-row span:last-child {
  font-weight: 600;
  color: var(--accent-color);
  font-variant-numeric: tabular-nums;
}

/* Base affected */
.summary-subtotal-line {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0.15rem 0;
}

/* Extras */
.summary-extras {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.extra-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-secondary);
  padding: 0.15rem 0;
}

.extra-row span:last-child {
  text-align: right;
  max-width: 60%;
}

/* Total */
.summary-total-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0.15rem 0;
}

/* Discount */
.summary-discount {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--red);
  padding: 0.25rem 0;
}

.discount-amount {
  font-weight: 700;
}

/* Final Price */
.summary-final {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.25rem;
}

.summary-final span:first-child {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.final-price {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent-color);
  letter-spacing: -0.03em;
  line-height: 1;
  transition: all 0.3s ease;
  text-shadow: 0 0 24px var(--accent-glow);
}

/* Price update animation */
.price-updated {
  animation: pulse-price 0.35s ease;
}

@keyframes pulse-price {
  0% { transform: scale(1); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

/* ----- Summary Actions ----- */
.summary-card__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--glass-border);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn svg {
  flex-shrink: 0;
}

.btn--primary {
  background: var(--accent-color);
  color: #0c0d0e;
}

.btn--primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-1px);
}

.btn--primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn--outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--glass-border);
}

.btn--outline:hover:not(:disabled) {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background: var(--accent-subtle);
}

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 1.5rem 0;
}

.footer__inner {
  text-align: center;
}

.footer p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .checkbox-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .main {
    grid-template-columns: 1fr;
  }
  .summary-column {
    position: static;
  }
  .summary-card {
    position: relative;
    top: auto;
  }
}

@media (max-width: 640px) {
  .header__inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .header__tagline {
    font-size: 0.72rem;
  }
  .split-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  .product-card {
    padding: 0.7rem;
  }
  .product-card__name {
    font-size: 0.75rem;
  }
  .product-card__price {
    font-size: 0.95rem;
  }
  .chip-group {
    gap: 0.4rem;
  }
  .chip {
    padding: 0.35rem 0.85rem;
  }
  .chip__text {
    font-size: 0.78rem;
  }
  .form-group {
    padding: 1.1rem;
  }
  .summary-card {
    padding: 1.25rem;
  }
  .final-price {
    font-size: 1.4rem;
  }
  .summary-card__actions {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 400px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
  .container {
    padding: 0 1rem;
  }
}

/* ----- Print Styles ----- */
@media print {
  .header,
  .footer,
  .summary-card__actions {
    display: none !important;
  }
  .main {
    display: block !important;
  }
  .form-column {
    display: none !important;
  }
  .summary-column {
    position: static !important;
  }
  .summary-card {
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    background: white !important;
    color: #111 !important;
  }
  .summary-card * {
    color: #111 !important;
  }
  .final-price {
    color: #0c0d0e !important;
    text-shadow: none !important;
  }
  .summary-divider--thick {
    box-shadow: none !important;
  }
}