/* Bandasanda — hoja de estilos común */

:root{
  --bg:#151b2b;
  --bg-alt:#1c2436;
  --bg-contrast:#eee8dc;
  --text:#e4e0d4;
  --text-dim:#8a93a5;
  --text-on-contrast:#151b2b;
  --accent:#c98a4c;
  --accent2:#7fa3b8;
  --mono:ui-monospace,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --gap:24px;
}

*{box-sizing:border-box}

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

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block}

a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}

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

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}

/* ---------- Cabecera y navegación ---------- */

.site-head{
  border-bottom:1px solid rgba(138,147,165,.28);
  padding:22px 0;
}

.head-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:14px 28px;
}

.brand{
  font-family:var(--mono);
  font-size:15px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--text);
  text-decoration:none;
}
.brand span{color:var(--accent)}

.site-nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:8px 22px;
}

.site-nav a{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--text-dim);
  text-decoration:none;
  padding:4px 0;
  border-bottom:1px solid transparent;
}
.site-nav a:hover{color:var(--text);border-bottom-color:var(--accent)}
.site-nav a[aria-current="page"]{color:var(--text);border-bottom-color:var(--accent)}

/* ---------- Perforación (motivo de película) ---------- */

.perf{
  height:10px;
  background:repeating-linear-gradient(90deg,
    rgba(127,163,184,.42) 0 10px,
    transparent 10px 26px);
}
.perf-dark{
  background:repeating-linear-gradient(90deg,
    rgba(21,27,43,.35) 0 10px,
    transparent 10px 26px);
}

/* ---------- Hero ---------- */

.hero{padding:70px 0 88px}

.hero-rail{
  grid-column:1 / 3;
  display:flex;
  flex-direction:column;
  gap:18px;
  padding-top:8px;
}
.hero-rail span{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--text-dim);
  display:flex;
  align-items:center;
  gap:10px;
}
.hero-rail span::before{
  content:"";
  width:9px;height:9px;
  background:var(--accent2);
  flex:0 0 auto;
}
.hero-rail span:nth-child(odd)::before{background:var(--accent)}

.hero-text{grid-column:3 / 12}

.kicker{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--accent2);
  margin:0 0 22px;
}

h1{
  font-family:var(--mono);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.06em;
  line-height:1.22;
  font-size:clamp(26px,3.4vw,44px);
  margin:0 0 26px;
  max-width:18ch;
}

.hero-lead{grid-column:3 / 9;margin:0;color:var(--text)}
.hero-lead + .hero-lead{margin-top:18px}

.hero-figure{
  grid-column:6 / 13;
  justify-self:end;
  max-width:620px;
  width:100%;
  margin-top:52px;
}
.hero-figure img{
  border:2px solid rgba(201,138,76,.75);
  width:100%;
}
.hero-figure figcaption,
figure figcaption{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--text-dim);
  margin-top:10px;
  text-align:right;
}

/* ---------- Secciones / escenas ---------- */

.scene{padding:88px 0;border-top:1px solid rgba(138,147,165,.2)}
.scene:nth-of-type(even){background:var(--bg-alt)}

.scene-num{
  grid-column:1 / 3;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.2em;
  color:var(--accent);
}
.scene-num::after{
  content:"";
  display:block;
  height:1px;
  background:rgba(201,138,76,.55);
  margin-top:12px;
  width:52px;
}

.scene-body{grid-column:3 / 10}
.scene-wide{grid-column:3 / 12}

h2{
  font-family:var(--mono);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.1em;
  line-height:1.35;
  font-size:clamp(19px,2vw,25px);
  margin:0 0 22px;
}

h3{
  font-family:var(--mono);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.12em;
  font-size:14px;
  color:var(--accent2);
  margin:34px 0 12px;
}

p{margin:0 0 18px}
p:last-child{margin-bottom:0}

.dim{color:var(--text-dim)}

/* listas y checklists */

.checklist{
  grid-column:3 / 12;
  list-style:none;
  margin:26px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px 40px;
}
.checklist li{
  position:relative;
  padding-left:22px;
  font-size:16px;
  line-height:1.65;
}
.checklist li::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:8px;height:8px;
  background:var(--accent);
}

.plain{
  grid-column:3 / 10;
  margin:22px 0 0;
  padding-left:20px;
}
.plain li{margin-bottom:10px}
.plain li::marker{color:var(--accent2)}

/* ---------- Sección contrastada ---------- */

.scene-contrast{
  background:var(--bg-contrast);
  color:var(--text-on-contrast);
  border-top:none;
}
.scene-contrast:nth-of-type(even){background:var(--bg-contrast)}
.scene-contrast h2,
.scene-contrast h3{color:var(--text-on-contrast)}
.scene-contrast .scene-num{color:#8a5a25}
.scene-contrast .scene-num::after{background:rgba(21,27,43,.35)}
.scene-contrast .dim{color:#5c6272}
.scene-contrast a{color:#8a5a25}
.scene-contrast .checklist li::before{background:#8a5a25}
.scene-contrast figcaption{color:#5c6272;text-align:left}

.detail-figure{
  grid-column:3 / 7;
  margin:0;
}
.detail-figure img{
  border:2px solid rgba(21,27,43,.35);
  width:100%;
}
.detail-text{grid-column:8 / 13}

/* ---------- Bloques numerados (About) ---------- */

.steps{padding:0;margin:0;list-style:none}
.steps > li{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:var(--gap);
  padding:34px 0;
  border-top:1px solid rgba(138,147,165,.22);
}
.steps > li:first-child{border-top:none;padding-top:0}
.steps .step-num{
  grid-column:1 / 3;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.2em;
  color:var(--accent);
}
.steps .step-body{grid-column:3 / 10}

/* ---------- Páginas de texto ---------- */

.page-head{padding:64px 0 34px}
.page-head .grid > *{grid-column:3 / 11}
.page-head h1{max-width:24ch}

.doc{padding:0 0 88px}
.doc .grid > *{grid-column:3 / 10}
.doc h2{margin-top:44px}
.doc h2:first-of-type{margin-top:0}

/* ---------- Pie ---------- */

.site-foot{
  background:var(--bg-contrast);
  color:var(--text-on-contrast);
}
.foot-inner{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:var(--gap);
  padding:56px 0 48px;
}
.foot-left{grid-column:1 / 7}
.foot-right{grid-column:8 / 13}

.site-foot .foot-name{
  font-family:var(--mono);
  font-size:15px;
  letter-spacing:.22em;
  text-transform:uppercase;
  margin:0 0 14px;
}
.site-foot p{font-size:15.5px;line-height:1.7;color:#3c4355}
.site-foot a{color:#8a5a25}
.foot-nav ul{list-style:none;margin:0 0 16px;padding:0;display:flex;flex-wrap:wrap;gap:8px 20px}
.foot-nav a{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  text-decoration:none;
  border-bottom:1px solid rgba(138,90,37,.5);
}
.foot-nav a:hover{border-bottom-width:2px}
.foot-mail{font-family:var(--mono);font-size:13.5px;letter-spacing:.06em}

/* ---------- Adaptación ---------- */

@media (max-width:900px){
  .hero-rail{
    grid-column:1 / 13;
    flex-direction:row;
    flex-wrap:wrap;
    gap:14px 20px;
    margin-bottom:26px;
  }
  .hero-text,
  .hero-lead,
  .hero-figure,
  .scene-body,
  .scene-wide,
  .checklist,
  .plain,
  .detail-figure,
  .detail-text,
  .steps .step-body,
  .page-head .grid > *,
  .doc .grid > *{grid-column:1 / 13}
  .scene-num,
  .steps .step-num{grid-column:1 / 13}
  .scene-num::after{width:100%;max-width:180px}
  .hero-figure{justify-self:stretch;max-width:100%;margin-top:38px}
  .hero-figure figcaption{text-align:left}
  .detail-figure{max-width:460px;margin-bottom:30px}
  .foot-left,.foot-right{grid-column:1 / 13}
  .foot-right{margin-top:28px}
}

@media (max-width:640px){
  body{font-size:16.5px}
  .wrap{padding:0 18px}
  .hero{padding:44px 0 52px}
  .scene{padding:52px 0}
  .page-head{padding:44px 0 26px}
  .doc{padding:0 0 52px}
  .checklist{grid-template-columns:minmax(0,1fr);gap:11px}
  .head-inner{flex-direction:column;align-items:flex-start}
  .site-nav ul{gap:6px 16px}
  .steps > li{padding:26px 0}
  .foot-inner{padding:44px 0 40px}
}