/* ============================================================
   Brothers' Cold Brew · Dirección C «Cold lab»
   Ficha técnica / laboratory datasheet (concepto no oficial)
   Palette: paper #FAFBFC · steel #3D5A80 · ink #16202B · hairline #C9D3DC
   Type: Space Grotesk (display/body) + IBM Plex Mono (data rows)
   ============================================================ */

:root {
  --paper: #FAFBFC;
  --steel: #3D5A80;
  --steel-deep: #33506F;
  --ink: #16202B;
  --ink-soft: #4A5A6E;
  --hair: #C9D3DC;
  --font-sans: "Space Grotesk", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;
  --pad-x: clamp(1rem, 4vw, 3rem);
}

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

html { -webkit-text-size-adjust: 100%; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* clip (not hidden) so the sticky spec bar keeps working */
html, body { overflow-x: clip; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
::selection { background: var(--steel); color: #fff; }
:focus-visible { outline: 2px solid var(--steel); outline-offset: 2px; }

.mono { font-family: var(--font-mono); }

.wrap { max-width: 1140px; margin-inline: auto; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 60;
  background: var(--steel); color: #fff;
  padding: 0.6rem 1rem; text-decoration: none; font-size: 0.85rem;
}
.skip:focus { left: 0; }

/* ---------- spec bar (nav) ---------- */

.specbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 1.25rem;
  min-height: 56px; padding: 0.35rem var(--pad-x);
  background: rgba(250, 251, 252, 0.97);
  border-bottom: 1px solid var(--hair);
}

.wordmark {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-weight: 700; font-size: 0.92rem; letter-spacing: 0.02em;
  text-decoration: none; white-space: nowrap;
}
.wordmark svg { flex: none; color: var(--steel); }

.specbar nav { margin-left: auto; display: flex; gap: 1.15rem; }
.specbar nav a {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.09em;
  color: var(--ink-soft); text-decoration: none; white-space: nowrap;
  padding: 0.3rem 0; border-bottom: 1px solid transparent;
}
.specbar nav a:hover { color: var(--steel); }
.specbar nav a[aria-current] { color: var(--steel); border-bottom-color: var(--steel); }

/* ---------- buttons (one sharp-radius system, page-wide) ---------- */

.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  background: var(--steel); color: #fff; border: 1px solid var(--steel);
  font-family: var(--font-sans); font-weight: 500; font-size: 0.9rem;
  padding: 0.7rem 1.15rem; text-decoration: none; white-space: nowrap;
  transition: background-color 0.15s ease, transform 0.1s ease;
}
.btn:hover { background: var(--steel-deep); }
.btn:active { transform: translateY(1px); }
.btn svg { flex: none; }

.btn-ghost { background: transparent; color: var(--steel); }
.btn-ghost:hover { background: #E7EDF3; }

.btn-chip { padding: 0.42rem 0.75rem; font-size: 0.76rem; }

/* ---------- hero: spec plate ---------- */

.hero { padding: clamp(2rem, 5vw, 3.25rem) var(--pad-x) clamp(3rem, 6vw, 4.5rem); }

.plate-head { margin-bottom: 0.9rem; }

.spec-no {
  display: inline-flex; align-items: center; gap: 0.5rem;
  margin: 0 0 0.9rem;
  font-size: 0.7rem; letter-spacing: 0.16em; color: var(--steel);
}
.spec-no svg { flex: none; }

h1 {
  margin: 0;
  font-size: clamp(2.35rem, 6.5vw, 4.1rem);
  font-weight: 700; line-height: 1.02; letter-spacing: -0.02em;
}

.hero-sub {
  max-width: 56ch; margin: 0.8rem 0 1.3rem;
  color: var(--ink-soft); font-size: 1.02rem;
}

.hero-cta { margin: 0 0 1.75rem; }

/* shared photo frame */
.photo { margin: 0; border: 1px solid var(--hair); background: var(--paper); }
.photo img { width: 100%; height: auto; object-fit: cover; }
.photo figcaption {
  border-top: 1px solid var(--hair);
  padding: 0.45rem 0.7rem;
  font-size: 0.62rem; letter-spacing: 0.08em; color: var(--ink-soft);
}

/* hero plate + spec callouts (leader lines) */
.plate-wrap { position: relative; }
.plate .plate-wrap img { aspect-ratio: 16 / 9; }

.callout {
  position: absolute; margin: 0;
  font-size: 0.68rem; letter-spacing: 0.1em; white-space: nowrap;
  background: var(--paper); color: var(--ink);
  padding: 0.28rem 0.5rem;
}
.callout::before {
  content: ""; position: absolute; top: 50%;
  width: 44px; height: 1px; background: var(--paper);
}
.callout::after {
  content: ""; position: absolute; top: 50%;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--paper); transform: translate(-50%, -50%);
}
.co-a { top: 15%; left: 4%; }
.co-a::before { left: 100%; }
.co-a::after { left: calc(100% + 44px); }
.co-b { top: 9%; right: 4%; }
.co-b::before { right: 100%; }
.co-b::after { right: calc(100% + 44px); }
.co-c { bottom: 15%; left: 10%; }
.co-c::before { left: 100%; }
.co-c::after { left: calc(100% + 44px); }

/* ---------- sections: datasheet grid ---------- */

section {
  border-top: 1px solid var(--hair);
  padding: clamp(3.25rem, 7vw, 5.5rem) var(--pad-x);
  scroll-margin-top: 72px;
}
.hero { border-top: 0; }

.sec-head {
  display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap;
  border-bottom: 1px solid var(--hair);
  padding-bottom: 1rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}
.code {
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.12em; color: var(--steel);
}
.sec-head h2 {
  margin: 0; font-size: clamp(1.45rem, 3.4vw, 2.05rem);
  line-height: 1.1; letter-spacing: -0.01em;
}
.sec-note {
  margin-left: auto; font-size: 0.68rem;
  letter-spacing: 0.06em; color: var(--ink-soft);
}

.lead { max-width: 58ch; margin: 0 0 1.25rem; color: var(--ink-soft); }

/* spec modules: hairlines only BETWEEN rows */
.mod-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.module { border: 1px solid var(--hair); padding: 1.2rem 1.2rem 0.4rem; }
.module h3 {
  display: flex; align-items: baseline; gap: 0.7rem;
  margin: 0 0 0.9rem;
  font-size: 1rem; font-weight: 700;
  letter-spacing: 0.05em; text-transform: uppercase;
}
.module h3 .code { font-size: 0.68rem; }

.spec-rows { margin: 0; }
.spec-rows div {
  display: grid; grid-template-columns: minmax(96px, auto) 1fr;
  gap: 0.3rem 1rem; align-items: baseline;
  padding: 0.55rem 0;
}
.spec-rows div + div { border-top: 1px solid var(--hair); }
.spec-rows dt {
  font-family: var(--font-mono); font-size: 0.64rem;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft);
}
.spec-rows dd {
  margin: 0; text-align: right;
  font-family: var(--font-mono); font-size: 0.84rem;
  font-variant-numeric: tabular-nums;
  overflow-wrap: break-word;
}

/* método: protocol steps + photo */
.metodo-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3rem); align-items: start;
}

.steps { list-style: none; margin: 0; padding: 0; }
.steps li {
  display: grid; grid-template-columns: auto 1fr;
  gap: 1rem; padding: 0.95rem 0;
}
.steps li + li { border-top: 1px solid var(--hair); }
.steps li:first-child { padding-top: 0.25rem; }
.steps .code { padding-top: 0.2rem; }
.steps h3 {
  margin: 0 0 0.2rem; font-size: 0.98rem;
  letter-spacing: 0.04em; text-transform: uppercase;
}
.steps p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* catering / mayoreo panel */
.cater-panel {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1.5rem, 4vw, 2.5rem); align-items: start;
  border: 1px solid var(--hair);
  padding: clamp(1.25rem, 3vw, 2rem);
}
.cater-cta { margin: 0; }

.channels { margin: 0; }
.channels div {
  display: grid; grid-template-columns: minmax(84px, auto) 1fr;
  gap: 0.3rem 1rem; align-items: baseline; padding: 0.6rem 0;
}
.channels div + div { border-top: 1px solid var(--hair); }
.channels dt {
  font-size: 0.64rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-soft);
}
.channels dd {
  margin: 0; text-align: right;
  font-family: var(--font-mono); font-size: 0.84rem;
  overflow-wrap: break-word;
}

/* visítanos */
.visit-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem); align-items: start;
}

.addr {
  display: block; margin: 0 0 1.3rem;
  font-size: 1.08rem; line-height: 1.6;
}
.addr svg {
  vertical-align: -2px; margin-right: 0.35rem; color: var(--steel);
}

.badge {
  display: inline-flex; align-items: center; gap: 0.75rem;
  border: 1px solid var(--hair); background: #fff;
  padding: 0.6rem 0.9rem;
}
.badge svg { flex: none; }
.badge-txt { font-size: 0.7rem; letter-spacing: 0.04em; }

.visit-cta { margin: 1.3rem 0 0; }

/* ---------- footer: lab sign-off strip ---------- */

footer {
  border-top: 2px solid var(--ink);
  padding: clamp(2.25rem, 6vw, 3.5rem) var(--pad-x) 2rem;
}

.signoff {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
  border-bottom: 1px solid var(--hair);
  padding-bottom: 1.4rem; margin-bottom: 1.2rem;
}
.signoff-claim {
  margin: 0; color: var(--steel);
  font-size: clamp(1.55rem, 4vw, 2.3rem);
  font-weight: 700; letter-spacing: 0.02em; line-height: 1;
}
.signoff-ref { font-size: 0.64rem; letter-spacing: 0.12em; color: var(--ink-soft); }
.signoff-founders { font-size: 0.72rem; color: var(--ink-soft); margin-top: 0.5rem; }

.colophon {
  margin: 0; max-width: 78ch;
  font-size: 0.7rem; line-height: 1.85; color: var(--ink-soft);
}
.colophon a { color: var(--steel); }

.disclosure {
  margin: 0.9rem 0 0;
  font-size: 0.7rem; letter-spacing: 0.04em; color: var(--ink);
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .mod-grid { grid-template-columns: 1fr; }
  .metodo-grid,
  .visit-grid,
  .cater-panel { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .specbar nav { display: none; }
  .specbar .btn-chip { margin-left: auto; }
}

@media (max-width: 640px) {
  .plate .plate-wrap img {
    aspect-ratio: auto;
    height: 45vh;   /* fallback */
    height: 45svh;  /* cap: brief hard rule */
  }
  .callout { font-size: 0.56rem; padding: 0.2rem 0.35rem; }
  .callout::before { width: 20px; }
  .co-a::after { left: calc(100% + 20px); }
  .co-b::after { right: calc(100% + 20px); }
  .co-c::after { left: calc(100% + 20px); }
  .co-a { top: 12%; left: 3%; }
  .co-b { top: 6%; right: 3%; }
  .co-c { bottom: 12%; left: 6%; }
  .spec-rows dd,
  .channels dd { text-align: left; }
  .spec-rows div,
  .channels div { grid-template-columns: minmax(84px, auto) 1fr; }
}

@media (max-width: 420px) {
  .wordmark { font-size: 0.82rem; }
  .btn-chip { font-size: 0.72rem; padding: 0.38rem 0.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .btn:active { transform: none; }
}