/* ============================================================
   Voltaje · estilos de PÁGINA DE PROYECTO (case study)
   Lo enlazan todas las /portfolio/<slug>.html
   ============================================================ */
:root{
  --bg:#0B0B0F; --bg2:#08080C; --lima:#C6FF2E; --azul:#2D6CFF;
  --txt:#FFFFFF; --gris:#AEB4BE; --card:#121217; --line:rgba(255,255,255,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:'Space Grotesk',system-ui,sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
.wrap{max-width:880px;margin:0 auto;padding:0 24px}

/* NAV */
nav{position:sticky;top:0;z-index:40;background:rgba(11,11,15,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
nav .inner{display:flex;align-items:center;justify-content:space-between;height:60px;max-width:880px;margin:0 auto;padding:0 24px}
nav .back{color:var(--gris);font-size:14px;font-weight:600}
nav .back:hover{color:var(--lima)}
nav .brand{font-weight:700;font-size:14px;color:var(--gris)}

/* HERO */
.hero{padding:54px 0 36px}
.kicker{display:inline-flex;align-items:center;gap:12px;color:var(--lima);font-weight:700;font-size:13px;letter-spacing:.26em;text-transform:uppercase;margin-bottom:18px}
.kicker::before{content:"";width:32px;height:3px;background:var(--lima)}
.hero h1{font-family:'Anton',sans-serif;font-weight:400;text-transform:uppercase;font-size:clamp(38px,7vw,76px);line-height:.95;letter-spacing:-.01em}
.hero h1 .lima{color:var(--lima)}
.badge{display:inline-block;margin-top:18px;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:6px 12px;border-radius:999px}
.badge.prod{background:rgba(198,255,46,.14);color:var(--lima)}
.badge.proto{background:rgba(45,108,255,.16);color:#7aa2ff}
.badge.acad{background:rgba(174,180,190,.14);color:var(--gris)}
.lead{color:var(--gris);font-size:clamp(17px,2.4vw,22px);max-width:680px;margin:20px 0 0}

/* VISUAL del hero */
.visual{margin:34px 0 6px;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:var(--bg2)}
.visual img{width:100%;display:block}
.visual.mono{height:300px;display:flex;align-items:center;justify-content:center;
  background-image:radial-gradient(rgba(255,255,255,.05) 1.3px,transparent 1.3px);background-size:30px 30px;background-color:var(--bg2)}
.visual.mono span{font-family:'Anton',sans-serif;font-size:clamp(70px,12vw,130px);text-transform:uppercase;letter-spacing:.02em}
.visual.mono span .l{color:var(--lima)}

/* SECCIONES */
main{padding:24px 0 40px}
.section{padding:26px 0;border-top:1px solid var(--line)}
.section h2{font-family:'Anton',sans-serif;font-weight:400;text-transform:uppercase;font-size:clamp(22px,3.4vw,32px);letter-spacing:-.01em;margin-bottom:12px}
.section h2 .lima{color:var(--lima)}
.section p{color:var(--gris);font-size:16.5px;margin-bottom:10px}
.section p b{color:var(--txt)}
.section ul{color:var(--gris);font-size:16.5px;margin:6px 0 10px 22px}
.section li{margin-bottom:6px}

/* STACK tags */
.stack-tags{display:flex;flex-wrap:wrap;gap:8px}
.stack-tags span{font-size:13px;color:var(--gris);border:1px solid var(--line);border-radius:8px;padding:5px 11px;font-family:'Space Grotesk',monospace}

/* GALERÍA */
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:6px}
.gallery img{width:100%;border-radius:12px;border:1px solid var(--line);display:block}

/* ENLACES / botones */
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:15px;padding:13px 20px;border-radius:12px;transition:transform .12s,border-color .12s,background .12s}
.btn.primary{background:var(--lima);color:#0B0B0F}
.btn.primary:hover{transform:translateY(-2px)}
.btn.ghost{border:1px solid var(--line);color:var(--txt)}
.btn.ghost:hover{border-color:var(--lima);transform:translateY(-2px)}

/* FOOTER */
footer{border-top:1px solid var(--line);padding:24px 0;color:#54545C;font-size:13px}
footer .inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;max-width:880px;margin:0 auto;padding:0 24px}
footer a:hover{color:var(--gris)}
.credit{color:#54545C;font-size:12px;margin:8px 0 0}
.credit a{color:#6b6b73}