/* Kaldera - estilos
   Paleta: lago (tinta verde azulada), bruma (fondo), azufre (acento), basalto, niebla */
:root {
  --lago: #0F2B33;
  --basalto: #2B3B40;
  --bruma: #E3EEEC;
  --vapor: #F6FAF9;
  --niebla: #BFD3D0;
  --azufre: #E9C74A;
  --azufre-osc: #7A5F00;
  --texto: #10262C;
  --muted: #476067;
  --display: 'Bricolage Grotesque', 'Helvetica Neue', Arial, sans-serif;
  --body: 'Literata', Georgia, 'Times New Roman', serif;
  --max: 1160px;
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--texto);
  background: var(--bruma);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
h1, h2, h3 { font-family: var(--display); line-height: 1.04; letter-spacing: -0.025em; }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); font-weight: 800; }
p { max-width: 62ch; }
a { color: inherit; }

:focus-visible { outline: 3px solid var(--azufre); outline-offset: 3px; }
.panel :focus-visible, .site-footer :focus-visible { outline-color: var(--azufre); }
.site-header :focus-visible, main :focus-visible { outline-color: var(--lago); }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--lago); color: var(--vapor); padding: .6rem 1rem; z-index: 50; }
.skip:focus { left: 0; }

.wrap { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
section { padding-block: clamp(4rem, 9vw, 7rem); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(227, 238, 236, .92); backdrop-filter: blur(8px); border-bottom: 1px solid rgba(15, 43, 51, .12); }
.bar { display: flex; align-items: center; gap: 1.5rem; min-height: 4.25rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; font-family: var(--display); font-weight: 800; font-size: 1.35rem; letter-spacing: -0.02em; }
.nav { display: flex; gap: 1.75rem; margin-left: auto; font-family: var(--display); font-weight: 600; font-size: .98rem; }
.nav a { text-decoration: none; padding-block: .25rem; background: linear-gradient(var(--lago), var(--lago)) 0 100% / 0 2px no-repeat; transition: background-size .2s; }
.nav a:hover { background-size: 100% 2px; }
.menu-btn { display: none; }
.cart-btn { font-family: var(--display); font-weight: 600; font-size: .95rem; background: var(--lago); color: var(--vapor); border: 0; border-radius: 999px; padding: .55rem 1rem; cursor: pointer; }
.cart-btn span { display: inline-block; min-width: 1.4rem; margin-left: .3rem; padding: 0 .35rem; border-radius: 999px; background: var(--azufre); color: var(--lago); text-align: center; }

/* Botones */
.btn { display: inline-block; font-family: var(--display); font-weight: 600; font-size: 1.02rem; text-decoration: none; border-radius: 999px; padding: .85rem 1.5rem; border: 2px solid transparent; cursor: pointer; transition: transform .15s, background .15s; }
.btn-solid { background: var(--lago); color: var(--vapor); }
.btn-solid:hover { background: var(--basalto); transform: translateY(-1px); }
.btn-text { padding-inline: .5rem; text-decoration: underline; text-underline-offset: .3em; text-decoration-thickness: 2px; }

/* Hero */
.hero { padding-block: clamp(2.5rem, 6vw, 5rem); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.hero h1 { font-size: clamp(2.7rem, 6.2vw, 5.4rem); font-weight: 800; letter-spacing: -0.035em; margin-bottom: 1.5rem; }
.lead { font-size: 1.2rem; color: var(--muted); margin-bottom: 2rem; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }

/* Panel simulador */
.panel { background: var(--lago); color: var(--bruma); border-radius: 28px; padding: clamp(1.25rem, 3vw, 2rem); box-shadow: 0 30px 60px -30px rgba(15, 43, 51, .7); }
.panel h2 { font-size: 1.6rem; margin-bottom: 1rem; }
.mode { display: inline-flex; border: 1px solid rgba(227, 238, 236, .3); border-radius: 999px; padding: 4px; margin-bottom: 1.25rem; }
.mode label { cursor: pointer; }
.mode input { position: absolute; opacity: 0; }
.mode span { display: block; padding: .45rem 1.1rem; border-radius: 999px; font-family: var(--display); font-weight: 600; font-size: .95rem; transition: background .15s, color .15s; }
.mode input:checked + span { background: var(--azufre); color: var(--lago); }
.mode input:focus-visible + span { outline: 3px solid var(--bruma); outline-offset: 2px; }

.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.duo figure { display: grid; justify-items: center; gap: .5rem; }
.sim-cup { width: min(100%, 112px); height: auto; overflow: visible; }
.cup-line { fill: none; stroke: var(--bruma); stroke-width: 3; stroke-linejoin: round; }
.cup-line-plain { stroke-dasharray: 5 5; stroke: var(--niebla); }
.cup-lid { fill: var(--azufre); }
.liquid { transition: fill .25s; transform-box: fill-box; transform-origin: bottom; transform: scaleY(0); }
.is-ready .liquid { transform: scaleY(1); transition: transform 1.4s cubic-bezier(.2, .8, .2, 1), fill .25s; }
.duo figcaption { display: grid; justify-items: center; font-family: var(--display); }
.duo figcaption span { font-size: .95rem; color: var(--niebla); }
.duo figcaption strong { font-size: 1.9rem; font-weight: 800; letter-spacing: -0.02em; }

#chart { width: 100%; height: auto; margin-bottom: .75rem; }
.slider { display: grid; gap: .4rem; margin-bottom: .75rem; }
.slider label { font-family: var(--display); font-weight: 600; }
.slider output { color: var(--azufre); }
input[type="range"] { width: 100%; accent-color: var(--azufre); height: 28px; cursor: pointer; }
.summary { font-family: var(--display); font-weight: 600; font-size: 1.05rem; margin-bottom: .5rem; }
.note { font-size: .85rem; color: var(--niebla); line-height: 1.5; }

/* Secciones */
.section-head { margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.section-head h2 { max-width: 16ch; margin-bottom: 1rem; }
.section-head p { color: var(--muted); }

/* Estante */
.models { background: var(--vapor); }
.shelf { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1rem, 3vw, 3rem); }
.product { display: grid; align-content: start; }
.stand { height: 360px; display: flex; align-items: flex-end; justify-content: center; border-bottom: 8px solid var(--lago); }
.stand svg { width: 140px; height: auto; }
.stand .body { transition: fill .3s; }
.product h3 { font-size: 1.7rem; font-weight: 800; margin-top: 1.25rem; }
.product .cap { font-family: var(--display); font-weight: 600; color: var(--azufre-osc); }
.product p.desc { margin-block: .5rem 1rem; color: var(--muted); font-size: 1rem; }
.swatches { display: flex; flex-wrap: wrap; gap: .5rem; border: 0; padding: 0; margin: 0 0 1rem; }
.swatches label { cursor: pointer; }
.swatches input { position: absolute; opacity: 0; }
.swatches .dot { display: block; width: 32px; height: 32px; border-radius: 50%; border: 2px solid var(--vapor); box-shadow: 0 0 0 1px rgba(15, 43, 51, .35); transition: box-shadow .15s; }
.swatches input:checked + .dot { box-shadow: 0 0 0 3px var(--lago); }
.swatches input:focus-visible + .dot { outline: 3px solid var(--lago); outline-offset: 3px; }
.color-name { font-family: var(--display); font-size: .95rem; margin-bottom: 1rem; }
.buy { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.price { font-family: var(--display); font-weight: 800; font-size: 1.4rem; }
.buy .btn { padding: .65rem 1.2rem; font-size: .95rem; }

/* Corte */
.inside-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.section-svg { width: min(100%, 360px); height: auto; margin-inline: auto; }
.layer { fill: var(--basalto); cursor: pointer; stroke: transparent; stroke-width: 3; transition: fill .2s, stroke .2s; }
.layer.vacuum { fill: repeating-linear-gradient(90deg, transparent, transparent); fill: #cfe0dd; }
.gasket { fill: var(--lago); }
.water { fill: #9fc3c9; }
.water-label { font-family: var(--display); font-size: 14px; fill: var(--lago); }
.layer.is-active { stroke: var(--azufre); fill: var(--lago); }
.layer.vacuum.is-active { fill: var(--azufre); }
.inside-copy h2 { margin-bottom: 1rem; max-width: 14ch; }
.inside-copy > p { color: var(--muted); margin-bottom: 1.5rem; }
.layer-tabs { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.25rem; }
.layer-tabs button { font-family: var(--display); font-weight: 600; font-size: .95rem; padding: .5rem 1rem; border-radius: 999px; background: transparent; color: var(--lago); border: 2px solid var(--lago); cursor: pointer; transition: background .15s, color .15s; }
.layer-tabs button[aria-selected="true"] { background: var(--lago); color: var(--vapor); }
.layer-text { min-height: 6.5rem; padding-left: 1rem; border-left: 4px solid var(--azufre); }

/* Preguntas */
.faq { background: var(--lago); color: var(--bruma); }
.faq-grid { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(2rem, 6vw, 5rem); }
.faq h2 { max-width: 12ch; }
.faq details { border-top: 1px solid rgba(227, 238, 236, .25); padding-block: 1.1rem; }
.faq details:last-child { border-bottom: 1px solid rgba(227, 238, 236, .25); }
.faq summary { font-family: var(--display); font-weight: 600; font-size: 1.2rem; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--azufre); font-size: 1.5rem; line-height: 1; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin-top: .75rem; color: var(--niebla); }
.faq summary:focus-visible { outline-color: var(--azufre); }

/* Contacto */
.contact-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(2rem, 6vw, 5rem); }
.contact h2 { margin-bottom: 1rem; max-width: 12ch; }
.contact-grid > div p { color: var(--muted); }
form { display: grid; gap: 1.1rem; }
.field label { display: block; font-family: var(--display); font-weight: 600; margin-bottom: .3rem; }
.field input, .field textarea { width: 100%; font: inherit; color: var(--texto); background: var(--vapor); border: 2px solid var(--basalto); border-radius: 12px; padding: .75rem 1rem; }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: #9B2C1B; }
.err { color: #8A2616; font-family: var(--display); font-weight: 600; font-size: .92rem; margin-top: .3rem; }
form .btn { justify-self: start; }
.sent { grid-column: 1 / -1; font-family: var(--display); font-weight: 600; font-size: 1.2rem; padding: 1.25rem; background: var(--vapor); border-left: 6px solid var(--azufre); }

/* Footer */
.site-footer { background: var(--lago); color: var(--bruma); padding-block: 2.5rem; }
.foot { display: grid; gap: .6rem; }
.foot p { font-size: .92rem; color: var(--niebla); }
.brand-foot { font-size: 1.15rem; }

/* Toast */
.toast { position: fixed; left: 50%; bottom: 1.5rem; transform: translateX(-50%); background: var(--lago); color: var(--vapor); border-left: 6px solid var(--azufre); padding: .85rem 1.25rem; border-radius: 10px; font-family: var(--display); font-weight: 600; z-index: 40; max-width: calc(100% - 2rem); }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid, .inside-grid, .faq-grid, .contact-grid { grid-template-columns: 1fr; }
  .shelf { grid-template-columns: 1fr; gap: 3.5rem; }
  .stand { height: auto; min-height: 280px; }
  .menu-btn { display: inline-block; margin-left: auto; font-family: var(--display); font-weight: 600; background: transparent; border: 2px solid var(--lago); color: var(--lago); border-radius: 999px; padding: .4rem .9rem; cursor: pointer; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; margin: 0; background: var(--bruma); border-bottom: 1px solid rgba(15, 43, 51, .15); padding: .5rem 1.25rem 1rem; }
  .nav.is-open { display: flex; }
  .nav a { padding-block: .8rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .liquid { transform: scaleY(1); }
}