/* ============================================================
   MCTidia — Impresión 3D · página completa
   Hereda tokens y barra de navegación de styles.css (mismo negro,
   cobre #ff9d5c, cian #35d6ff, tipografías). Aquí solo viven los
   estilos propios de esta página: tres paneles apilados —
   info técnica · materiales · calculadora de coste.
   ============================================================ */

/* Esta página no tiene la intro cinematográfica que dispara la coreografía
   de entrada de la barra (lo hace main.js al hacer scroll en la landing).
   Aquí la barra y sus piezas se muestran ya colocadas, sin animación: así
   nunca quedan invisibles aunque el navegador congele animaciones. */
.nav .e,
.nav.is-shown .e--drop { opacity: 1; animation: none; }

.p3d {
  padding-top: var(--nav-h);
  color: var(--text);
}

.p3d__wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ---------- Cabecera de la página ---------- */

.p3d__hero {
  padding: clamp(48px, 9vh, 120px) 0 clamp(32px, 5vh, 64px);
  border-bottom: 1px solid var(--hairline);
}

.p3d__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}
.p3d__back:hover { color: var(--cyan); }
.p3d__back svg { transform: rotate(180deg); }

.p3d__kicker {
  margin: 28px 0 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
}

.p3d__title {
  margin: 12px 0 0;
  font-family: var(--grot);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-size: clamp(2.6rem, 7vw, 5.2rem);
}
.p3d__title em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--cyan);
}

.p3d__intro {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- Estructura de panel ---------- */

.p3d__panel {
  padding: clamp(48px, 8vh, 96px) 0;
  border-bottom: 1px solid var(--hairline);
  /* la barra fija no debe tapar la sección al saltar por ancla */
  scroll-margin-top: var(--nav-h);
}

.p3d__panel-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: clamp(28px, 4vh, 48px);
}
.p3d__panel-num {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--copper);
  letter-spacing: 0.1em;
}
.p3d__panel-title {
  margin: 0;
  font-family: var(--grot);
  font-weight: 500;
  letter-spacing: -0.01em;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
}
.p3d__panel-sub {
  margin: 6px 0 0;
  color: var(--text-dim);
  font-size: 0.98rem;
  max-width: 60ch;
  line-height: 1.55;
}

/* ---------- Panel 1: información técnica ---------- */

.p3d__specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  overflow: hidden;
}
.p3d__spec {
  background: #050607;
  padding: clamp(20px, 2.4vw, 30px);
}
.p3d__spec-k {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.p3d__spec-v {
  margin: 10px 0 0;
  font-family: var(--grot);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.p3d__spec-d {
  margin: 8px 0 0;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-dim);
}

.p3d__flow {
  margin-top: clamp(28px, 4vh, 44px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  counter-reset: step;
}
.p3d__step {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
}
.p3d__step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
}
.p3d__step h3 {
  margin: 10px 0 6px;
  font-family: var(--grot);
  font-weight: 500;
  font-size: 1.05rem;
}
.p3d__step p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-dim);
}

/* ---------- Panel 2: materiales ---------- */

.p3d__mats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.p3d__mat {
  --mat: var(--copper);
  padding: 24px;
  border: 1px solid var(--hairline);
  border-radius: 14px;
  background: #050607;
  transition: border-color 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}
.p3d__mat:hover {
  border-color: color-mix(in oklab, var(--mat) 55%, var(--hairline));
  transform: translateY(-3px);
}
.p3d__mat-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.p3d__mat-name {
  margin: 0;
  font-family: var(--grot);
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--mat);
}
.p3d__mat-tag {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 4px 9px;
  white-space: nowrap;
}
.p3d__mat-desc {
  margin: 14px 0 0;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-dim);
}
.p3d__mat-props {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}
.p3d__mat-props li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--text-dim);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--hairline);
}
.p3d__mat-props li:last-child { border-bottom: 0; padding-bottom: 0; }
.p3d__mat-props b {
  color: var(--text);
  font-weight: 500;
}
.p3d__mat-use {
  margin: 16px 0 0;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-faint);
}
.p3d__mat-use span {
  color: var(--mat);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-right: 6px;
}

/* ---------- Panel 3: calculadora ---------- */

.p3d__calc {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}
@media (max-width: 820px) {
  .p3d__calc { grid-template-columns: 1fr; }
  /* en una sola columna el resultado va debajo del formulario, sin fijar.
     Selector con la especificidad suficiente para ganar a la base sticky. */
  .p3d__calc .p3d__result { position: static; }
}

.p3d__form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 20px;
}
@media (max-width: 480px) {
  .p3d__form { grid-template-columns: 1fr; }
}
.p3d__field { display: flex; flex-direction: column; gap: 7px; }
.p3d__field--full { grid-column: 1 / -1; }

.p3d__field label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.p3d__field small {
  font-size: 0.72rem;
  color: var(--text-faint);
  line-height: 1.4;
}
.p3d__input,
.p3d__select {
  width: 100%;
  padding: 12px 14px;
  background: #050607;
  border: 1px solid var(--hairline-hi);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--grot);
  font-size: 1rem;
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
  appearance: none;
}
.p3d__select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%2335d6ff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}
.p3d__input:focus-visible,
.p3d__select:focus-visible {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--cyan) 22%, transparent);
}
.p3d__input-unit {
  position: relative;
}
.p3d__input-unit .p3d__input { padding-right: 46px; }
.p3d__input-unit span {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  pointer-events: none;
}

/* Panel de resultados: pegajoso en escritorio para verlo mientras se ajusta. */
.p3d__result {
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  padding: clamp(22px, 2.6vw, 30px);
  border: 1px solid var(--hairline-hi);
  border-radius: 16px;
  background:
    radial-gradient(120% 80% at 100% 0%, color-mix(in srgb, var(--cyan) 9%, transparent), transparent 60%),
    #050607;
}
.p3d__result h3 {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.p3d__result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline);
}
.p3d__result-row span { color: var(--text-dim); font-size: 0.9rem; }
.p3d__result-row b { font-family: var(--grot); font-weight: 500; font-size: 1.05rem; font-variant-numeric: tabular-nums; }

.p3d__result-total {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-top: 18px;
  padding-top: 18px;
}
.p3d__result-total span {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.p3d__result-total b {
  font-family: var(--grot);
  font-weight: 600;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.p3d__note {
  margin: 16px 0 0;
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--text-faint);
}

.p3d__cta {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 22px;
  border-radius: 999px;
  background: var(--copper);
  color: #0a0603;
  font-family: var(--grot);
  font-weight: 600;
  font-size: 0.94rem;
  text-decoration: none;
  transition: transform 0.2s var(--ease-out), filter 0.2s var(--ease-out);
}
.p3d__cta:hover { transform: translateY(-2px); filter: brightness(1.08); }
.p3d__cta:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  .p3d__mat, .p3d__cta, .p3d__input, .p3d__select, .p3d__back { transition: none; }
}