/* ============================================================
   AhorroClima — sistema de diseño
   Display: Space Grotesk · Texto: Inter
   Paleta: petróleo/teal (clima) + verde (ahorro) + ámbar solar
   ============================================================ */

:root{
  --petrol:#0E3B38;     /* primario oscuro */
  --petrol-700:#12504C;
  --green:#17B978;      /* acento ahorro/eco */
  --green-600:#119C66;
  --solar:#F4B740;      /* acento solar, uso muy puntual */
  --ink:#102220;        /* texto principal */
  --slate:#566663;      /* texto secundario */
  --line:#E1ECE9;       /* hairlines */
  --bg:#F6FAF8;         /* fondo cool */
  --card:#FFFFFF;
  --shadow:0 1px 2px rgba(16,34,32,.04),0 8px 24px rgba(16,34,32,.06);
  --radius:14px;
  --maxw:1120px;
  --font-display:'Space Grotesk',system-ui,sans-serif;
  --font-body:'Inter',system-ui,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  font-size:17px;
}
img{max-width:100%;display:block}
a{color:var(--green-600);text-decoration:none}
a:hover{text-decoration:underline}

h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5vw,3.4rem);font-weight:700}
h2{font-size:clamp(1.6rem,3.5vw,2.3rem);font-weight:600;margin-top:1.6em}
h3{font-size:1.25rem;font-weight:600;margin-top:1.4em}
p{margin:0 0 1.1em}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.narrow{max-width:760px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(246,250,248,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.22rem;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand .mark{width:30px;height:30px;flex:0 0 30px}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{color:var(--slate);font-weight:500;font-size:.96rem}
.nav-links a:hover{color:var(--ink);text-decoration:none}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:4px 0;border-radius:2px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-display);font-weight:600;font-size:1rem;padding:13px 22px;border-radius:11px;border:0;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 6px 18px rgba(23,185,120,.28)}
.btn-primary:hover{background:var(--green-600);color:#fff}
.btn-ghost{background:#fff;color:var(--petrol);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--green);color:var(--green-600)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:
   radial-gradient(1100px 500px at 85% -10%,rgba(23,185,120,.10),transparent 60%),
   linear-gradient(180deg,#fff, var(--bg));
  border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:74px 0 64px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-display);font-weight:600;font-size:.82rem;letter-spacing:.04em;text-transform:uppercase;color:var(--green-600);background:rgba(23,185,120,.10);padding:6px 12px;border-radius:99px;margin-bottom:18px}
.hero h1 span{color:var(--green-600)}
.hero .lead{font-size:1.18rem;color:var(--slate);max-width:30em}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.hero-trust{margin-top:24px;font-size:.9rem;color:var(--slate);display:flex;gap:18px;flex-wrap:wrap}
.hero-trust b{color:var(--ink)}

/* Signature: tarjeta "factura que baja" */
.bill-card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:24px;position:relative}
.bill-card h4{font-size:.82rem;letter-spacing:.04em;text-transform:uppercase;color:var(--slate);font-weight:600;margin-bottom:18px;font-family:var(--font-display)}
.bars{display:flex;align-items:flex-end;gap:14px;height:172px;padding-top:8px}
.bar{flex:1;border-radius:8px 8px 0 0;position:relative;background:linear-gradient(180deg,#D8E8E3,#C4DDD6)}
.bar.now{background:linear-gradient(180deg,var(--green),var(--green-600))}
.bar .tag{position:absolute;top:-22px;left:50%;transform:translateX(-50%);font-family:var(--font-display);font-weight:700;font-size:.85rem;color:var(--ink);white-space:nowrap}
.bar .base{position:absolute;bottom:-24px;left:50%;transform:translateX(-50%);font-size:.78rem;color:var(--slate);white-space:nowrap}
.bill-foot{margin-top:42px;display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:16px}
.bill-foot .save{font-family:var(--font-display);font-weight:700;font-size:1.7rem;color:var(--green-600);line-height:1}
.bill-foot .save small{display:block;font-family:var(--font-body);font-weight:400;font-size:.78rem;color:var(--slate);letter-spacing:0;text-transform:none;margin-top:4px}

/* ---------- Sections ---------- */
section{padding:60px 0}
.section-head{max-width:640px;margin-bottom:38px}
.section-head .eyebrow{margin-bottom:14px}
.section-head p{color:var(--slate);font-size:1.08rem}

/* Cards de pilares */
.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .15s ease,box-shadow .15s ease;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.pcard .ic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:rgba(23,185,120,.10);margin-bottom:16px}
.pcard h3{margin:0 0 6px;font-size:1.12rem}
.pcard p{color:var(--slate);font-size:.95rem;margin:0;flex:1}
.pcard .go{margin-top:14px;font-family:var(--font-display);font-weight:600;font-size:.9rem;color:var(--green-600)}

/* Bloque ayudas destacado */
.aid{background:var(--petrol);color:#fff;border-radius:20px;padding:44px;display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center}
.aid h2{color:#fff;margin-top:0}
.aid p{color:rgba(255,255,255,.82)}
.aid .stat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:20px}
.aid .stat .big{font-family:var(--font-display);font-weight:700;font-size:2.4rem;color:var(--solar);line-height:1}
.aid .stat .lab{color:rgba(255,255,255,.78);font-size:.92rem;margin-top:6px}

/* Lista de artículos */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .15s ease,box-shadow .15s ease}
.post:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.post .cat{font-family:var(--font-display);font-weight:600;font-size:.76rem;letter-spacing:.04em;text-transform:uppercase;color:var(--green-600)}
.post .body{padding:22px;display:flex;flex-direction:column;gap:8px}
.post h3{margin:0;font-size:1.1rem}
.post p{color:var(--slate);font-size:.93rem;margin:0}

/* ---------- Article ---------- */
.article-head{padding:48px 0 8px;border-bottom:1px solid var(--line);background:#fff}
.crumbs{font-size:.86rem;color:var(--slate);margin-bottom:16px}
.crumbs a{color:var(--slate)}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:.88rem;color:var(--slate);margin-top:14px}
.article-body{padding:42px 0 20px}
.article-body h2{border-top:1px solid var(--line);padding-top:1.2em}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.3em}
.article-body li{margin-bottom:.5em}
.article-body table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.96rem}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 13px;text-align:left}
.article-body th{background:#EFF6F3;font-family:var(--font-display);font-weight:600}
.callout{background:#EFF6F3;border:1px solid var(--line);border-left:4px solid var(--green);border-radius:10px;padding:18px 20px;margin:1.4em 0}
.callout strong{font-family:var(--font-display)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin:0 0 2em}
.toc strong{font-family:var(--font-display);display:block;margin-bottom:10px}
.toc ol{margin:0;padding-left:1.2em}
.toc a{color:var(--slate)}

/* Bloque anuncio (placeholder hasta aprobación AdSense) */
.ad-slot{margin:2em 0;min-height:90px;display:grid;place-items:center;background:repeating-linear-gradient(45deg,#fff,#fff 10px,#F2F7F5 10px,#F2F7F5 20px);border:1px dashed #CFE0DB;border-radius:10px;color:#9FB4AF;font-size:.8rem;letter-spacing:.05em;text-transform:uppercase;font-family:var(--font-display)}

/* CTA presupuesto (lead-gen) */
.lead-box{background:linear-gradient(135deg,var(--petrol),var(--petrol-700));color:#fff;border-radius:16px;padding:30px;margin:2em 0;text-align:center}
.lead-box h3{color:#fff;margin:0 0 8px}
.lead-box p{color:rgba(255,255,255,.82);margin:0 0 18px}

/* ---------- Footer ---------- */
.site-footer{background:#0B2C2A;color:rgba(255,255,255,.75);padding:54px 0 30px;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.site-footer h5{font-family:var(--font-display);color:#fff;font-size:1rem;margin:0 0 14px}
.site-footer a{color:rgba(255,255,255,.72);font-size:.92rem;display:block;margin-bottom:8px}
.site-footer a:hover{color:#fff}
.foot-brand .brand{color:#fff;margin-bottom:12px}
.foot-brand p{font-size:.9rem;max-width:30ch}
.foot-bottom{border-top:1px solid rgba(255,255,255,.10);margin-top:34px;padding-top:20px;font-size:.84rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.disclosure{font-size:.84rem;color:rgba(255,255,255,.6);max-width:75ch;margin-top:10px}

/* ---------- Cookie banner ---------- */
.cookie{position:fixed;left:18px;right:18px;bottom:18px;z-index:90;max-width:560px;margin:0 auto;background:#fff;border:1px solid var(--line);box-shadow:0 12px 40px rgba(16,34,32,.18);border-radius:14px;padding:20px 22px;display:none}
.cookie.show{display:block}
.cookie p{font-size:.9rem;color:var(--slate);margin:0 0 14px}
.cookie .row{display:flex;gap:10px;flex-wrap:wrap}
.cookie .btn{padding:10px 18px;font-size:.92rem}

/* ---------- Responsive ---------- */
@media(max-width:920px){
  .hero-grid{grid-template-columns:1fr;gap:34px;padding:54px 0 48px}
  .pillars{grid-template-columns:repeat(2,1fr)}
  .posts{grid-template-columns:1fr 1fr}
  .aid{grid-template-columns:1fr;padding:32px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-links{position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:0;padding:8px 22px 18px;display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 0;width:100%}
  .nav-toggle{display:block}
  .pillars,.posts,.foot-grid{grid-template-columns:1fr}
  body{font-size:16px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}