/* Cryomat — superficies tonales, un primary, forma 12–16px.
   Sin sombras apiladas ni halos. Movimiento: revelado, borde y barra. */

:root {
  --surface: #0b0f17;
  --surface-container-low: #121822;
  --surface-container: #171e2a;
  --surface-container-high: #1e2634;
  --surface-container-highest: #273140;
  --on-surface: #e7ecf2;
  --on-surface-variant: #c5ceda;
  --outline: #9aa6b8;
  --outline-variant: #6e788a;
  --primary: #00f0ff;
  --on-primary: #00262b;
  --error: #ffb4ab;
  --error-strong: #ff3b30;
  --shape-sm: 8px;
  --shape-md: 12px;
  --shape-lg: 16px;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-emphasized: cubic-bezier(0.05, 0.7, 0.1, 1);
  --font-body: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  --font-display: "Syne", "Space Grotesk", "Avenir Next", sans-serif;
  --nav-h: 4.75rem;
  --wrap: 1120px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  background: var(--surface);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--on-surface);
  background: var(--surface);
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p { margin: 0; }

h1, h2, .metric-value, .logo-word {
  font-family: var(--font-display);
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.btn-primary:focus-visible { outline-color: var(--on-surface); }

.section:focus { outline: none; }

::selection {
  background: #005e66;
  color: var(--on-surface);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 80;
  padding: 0.75rem 1rem;
  border-radius: var(--shape-md);
  background: var(--primary);
  color: var(--on-primary);
  font-weight: 600;
  text-decoration: none;
}

.skip:focus { top: 1rem; }

.wrap {
  width: min(var(--wrap), calc(100% - 2.5rem));
  margin-inline: auto;
}

.icon {
  width: 1.35rem;
  height: 1.35rem;
  flex: none;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section { padding-block: 6rem; }

.section-head {
  display: grid;
  gap: 1rem;
  margin-bottom: 3rem;
}

.section-head h2 {
  max-width: 16ch;
  font-size: clamp(2.25rem, 4.5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.section-head p:last-child {
  max-width: 62ch;
  color: var(--on-surface-variant);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.7rem 1.2rem;
  border: 1px solid transparent;
  border-radius: var(--shape-md);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 200ms var(--ease-standard), border-color 200ms var(--ease-standard), color 200ms var(--ease-standard);
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

.btn-primary:hover { background: #67f6ff; border-color: #67f6ff; }

.btn-primary:active { background: #00c8d6; border-color: #00c8d6; }

.btn-secondary {
  background: transparent;
  border-color: var(--outline);
  color: var(--on-surface);
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: var(--surface-container);
}

.btn[aria-disabled="true"],
.btn[aria-disabled="true"]:hover,
.btn[aria-disabled="true"]:active {
  background: var(--surface-container-highest);
  border-color: var(--outline-variant);
  color: var(--on-surface-variant);
  cursor: not-allowed;
}

.text-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 48px;
  margin-top: auto;
  padding: 0;
  border: 0;
  background: none;
  color: var(--primary);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.text-btn:hover { text-decoration: underline; text-underline-offset: 0.22em; }

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(11, 15, 23, 0.78);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: background-color 200ms var(--ease-standard), border-color 200ms var(--ease-standard);
}

.nav.is-stuck {
  background: rgba(11, 15, 23, 0.92);
  border-bottom-color: var(--outline-variant);
}

.nav-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: var(--nav-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--on-surface);
  text-decoration: none;
  white-space: nowrap;
}

.logo-mark {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 2px;
  background: var(--primary);
}

.logo-word {
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  margin-left: 0.75rem;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--on-surface-variant);
  font-weight: 500;
  text-decoration: none;
}

.nav-links a:hover { color: var(--on-surface); }

.nav-end {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-left: auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0 0.75rem;
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-sm);
  background: var(--surface-container-high);
  color: var(--on-surface);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.badge:hover { border-color: var(--primary); }

.badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 2px;
  background: var(--error-strong);
}

.badge-short { display: none; }
.btn-short { display: none; }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-md);
  background: var(--surface-container);
  color: var(--on-surface);
}

.nav-toggle svg { width: 1.35rem; height: 1.35rem; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.nav-panel {
  display: grid;
  gap: 0.25rem;
  padding-bottom: 1rem;
}

.nav-panel[hidden] { display: none; }

.nav-panel a {
  display: flex;
  align-items: center;
  min-height: 48px;
  border-top: 1px solid var(--outline-variant);
  color: var(--on-surface);
  font-weight: 500;
  text-decoration: none;
}

.nav-panel .btn-primary {
  margin-top: 0.75rem;
  border-top: 0;
  color: var(--on-primary);
}

.hero { padding: 4.5rem 0 6rem; }

.hero-copy {
  display: grid;
  justify-items: start;
  gap: 1.75rem;
}

.hero-title { display: grid; gap: 0.85rem; }

.hero h1 {
  max-width: 100%;
  font-size: clamp(2.2rem, 6.2vw, 5.75rem);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

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

.lead {
  max-width: 42rem;
  color: var(--on-surface-variant);
  font-size: 1.125rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.metrics {
  display: grid;
  margin: 3.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--outline-variant);
}

.metrics div {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--outline-variant);
}

.metrics dt {
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.metrics dd { margin: 0; }

.metric-value {
  margin-top: 0.4rem;
  font-size: clamp(2.75rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.95;
  white-space: nowrap;
}

.metrics div dd:last-child {
  max-width: 32ch;
  margin-top: 0.7rem;
  color: var(--on-surface-variant);
}

.services {
  display: grid;
  gap: 1rem;
}

.service {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  min-height: 100%;
  padding: 1.6rem 1.4rem 1.15rem;
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-lg);
  background: var(--surface-container);
  transition: border-color 200ms var(--ease-standard), background-color 200ms var(--ease-standard);
}

.service:focus-within { border-color: var(--primary); }

.service-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--primary);
}

.service-index {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.service h3 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.12;
}

.service p,
.service li { color: var(--on-surface-variant); }

.service ul {
  margin: 0.2rem 0 0;
  padding: 0;
  list-style: none;
}

.service li {
  padding: 0.55rem 0;
  border-top: 1px solid var(--outline-variant);
}

.diag-layout { display: grid; gap: 1.25rem; align-items: start; }

fieldset {
  margin: 0 0 1.5rem;
  padding: 0;
  border: 0;
  min-inline-size: 0;
}

legend {
  margin-bottom: 0.75rem;
  padding: 0;
  font-size: 1.125rem;
  font-weight: 600;
}

.choices { display: grid; gap: 0.75rem; }

.choice {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem;
  border: 1px solid var(--outline);
  border-radius: var(--shape-md);
  background: var(--surface-container-low);
  cursor: pointer;
}

.choice input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.choice-title {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 600;
}

.choice-title::before {
  content: "";
  width: 0.72rem;
  height: 0.72rem;
  border: 1.5px solid var(--outline);
  border-radius: 2px;
  background: transparent;
}

.choice-copy {
  color: var(--on-surface-variant);
  font-size: 0.92rem;
}

.choice:has(input:checked) {
  border-color: var(--primary);
  background: var(--surface-container-high);
}

.choice:has(input:checked) .choice-title::before {
  border-color: var(--primary);
  background: var(--primary);
}

.choice:has(input:focus-visible) {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.readout {
  display: grid;
  gap: 1rem;
  align-content: start;
  padding: 1.35rem;
  border: 1px solid var(--outline-variant);
  border-top: 2px solid var(--primary);
  border-radius: var(--shape-lg);
  background: var(--surface-container);
}

#diag-output { display: grid; gap: 0.75rem; }

.readout h3 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.readout p { color: var(--on-surface-variant); }

.readout ul {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.readout li {
  position: relative;
  padding-left: 1rem;
  color: var(--on-surface-variant);
}

.readout li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 1px;
  background: var(--primary);
}

.sla {
  color: var(--on-surface);
  font-weight: 600;
}

.disclaimer {
  color: var(--on-surface-variant);
  font-size: 0.875rem;
}

.readout .btn { width: 100%; }

.spec {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--outline-variant);
}

.spec li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--outline-variant);
}

.spec-index {
  padding-top: 0.35rem;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.spec h3 {
  margin-bottom: 0.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.spec p {
  max-width: 62ch;
  color: var(--on-surface-variant);
}

.contact-layout { display: grid; gap: 2rem; }

.form-panel {
  padding: clamp(1.2rem, 3vw, 2rem);
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-lg);
  background: var(--surface-container);
}

.form-note {
  margin-bottom: 1rem;
  color: var(--on-surface-variant);
  font-size: 0.92rem;
}

.form-grid { display: grid; gap: 1rem; }

.field label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
}

.req { color: var(--primary); }

input,
select,
textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--outline);
  border-radius: var(--shape-md);
  background: var(--surface-container-highest);
  color: var(--on-surface);
  font: inherit;
  font-size: 1rem;
}

textarea {
  min-height: 9rem;
  resize: vertical;
}

select {
  appearance: none;
  padding-right: 2.6rem;
  background-color: var(--surface-container-highest);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23E7ECF2' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 1rem;
}

::placeholder { color: var(--on-surface-variant); opacity: 1; }

[aria-invalid="true"] { border-color: var(--error-strong); }

.field-error {
  margin-top: 0.35rem;
  color: var(--error);
  font-size: 0.875rem;
}

.form-actions { margin-top: 1.15rem; }

.form-status {
  min-height: 1.5rem;
  margin-top: 0.85rem;
  color: var(--on-surface);
}

.form-status a { color: var(--primary); }

.channels {
  display: grid;
  gap: 0.65rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.channels a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 52px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-md);
  background: var(--surface-container);
  color: var(--on-surface);
  text-decoration: none;
}

.channels a:hover { border-color: var(--primary); }

.side-note {
  margin-top: 1rem;
  color: var(--on-surface-variant);
}

.contact-side h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.footer {
  padding: 4rem 0 6.5rem;
  border-top: 1px solid var(--outline-variant);
  background: var(--surface-container-low);
}

.footer-grid {
  display: grid;
  gap: 2rem;
}

.footer p,
.footer a { color: var(--on-surface-variant); }

.footer-brand {
  display: grid;
  gap: 0.8rem;
  justify-items: start;
}

.footer nav,
.footer-contact {
  display: grid;
  gap: 0.35rem;
  align-content: start;
}

.footer nav a,
.footer-contact a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}

.footer a:hover { color: var(--on-surface); }

.footer-base {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--outline-variant);
  color: var(--on-surface-variant);
  font-size: 0.92rem;
}

.wa-float {
  position: fixed;
  z-index: 50;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0 1rem;
  border-radius: var(--shape-lg);
  background: var(--primary);
  color: var(--on-primary);
  font-weight: 700;
  text-decoration: none;
}

.wa-float.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 420ms var(--ease-emphasized), transform 420ms var(--ease-emphasized);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

:is(#especialidades, #calderas, #gases, #accesos, #diagnostico, #protocolo, #contacto) {
  scroll-margin-top: 5.5rem;
}

@media (min-width: 700px) {
  .choices.cols-2 { grid-template-columns: 1fr 1fr; }
  .choices.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-grid .full { grid-column: 1 / -1; }
}

@media (min-width: 800px) {
  .metrics { grid-template-columns: repeat(3, 1fr); }
  .metrics div {
    padding: 1.75rem 1.5rem 0 0;
    border-bottom: 0;
  }
  .metrics div + div {
    padding-left: 1.5rem;
    border-left: 1px solid var(--outline-variant);
  }
}

@media (min-width: 900px) {
  .wrap { width: min(var(--wrap), calc(100% - 4rem)); }
  .section { padding-block: 8rem; }
  .hero { padding: 6.5rem 0 8rem; }
  .metrics { margin-top: 5rem; }
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
}

@media (min-width: 1000px) {
  .services { grid-template-columns: repeat(3, 1fr); gap: 1.15rem; }
}

@media (min-width: 1020px) {
  .diag-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.78fr);
    gap: 1.5rem;
  }
  .readout { position: sticky; top: 6rem; }
  .contact-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.72fr);
    gap: 2.5rem;
  }
}

@media (max-width: 1040px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .badge-long { display: none; }
  .badge-short { display: inline; }
}

@media (max-width: 720px) {
  .nav-end .badge { display: none; }
  .btn-long { display: none; }
  .btn-short { display: inline; }
  .wa-float {
    width: 48px;
    height: 48px;
    padding: 0;
    justify-content: center;
  }
  .wa-float span {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}

@media (hover: hover) {
  .service:hover {
    border-color: var(--primary);
    background: var(--surface-container-high);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal,
  .js .reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .nav, .btn, .service, .badge, .channels a, .wa-float, .text-btn {
    transition: none;
  }
}

@media print {
  .nav, .wa-float, .nav-toggle { display: none !important; }
  body { background: #fff; color: #111; }
  .service, .readout, .form-panel { break-inside: avoid; }
}