/*
Theme Name: CSAI Energy Academy SEO - Guías
Theme URI: https://www.csai.cl/
Author: CSAI SpA
Description: Portal educativo de CSAI con guías reales de WordPress, SEO básico e ilustraciones.
Version: 3.0.0
Requires at least: 5.9
Requires PHP: 7.4
License: GPLv2 or later
Text Domain: csai-energy-academy
*/
:root{--blue:#0b5cff;--dark:#0f172a;--muted:#64748b;--bg:#f5f8fb;--line:#e2e8f0;--green:#10b981}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--dark);font-family:Arial,Helvetica,sans-serif;line-height:1.7}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.wrap{width:92%;max-width:1160px;margin:0 auto}
.header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}.head{min-height:72px;display:flex;justify-content:space-between;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:10px;color:var(--dark);font-weight:900}.brand:hover{text-decoration:none}.mark{width:40px;height:40px;border-radius:11px;background:var(--blue);color:#fff;display:grid;place-items:center}.brand small{display:block;font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.nav{display:flex;gap:18px;align-items:center}.nav a{font-size:14px;font-weight:800;color:#334155}.nav .cta{background:var(--blue);color:#fff;padding:10px 15px;border-radius:10px}
.hero{padding:76px 0 58px;background:linear-gradient(#fff,var(--bg))}.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:42px;align-items:center}.eyebrow{display:inline-block;background:#eaf2ff;color:var(--blue);padding:6px 10px;border-radius:999px;font-size:11px;font-weight:900;text-transform:uppercase}.hero h1{font-size:clamp(40px,6vw,70px);line-height:1;letter-spacing:-.045em;margin:18px 0}.hero p{font-size:19px;color:#475569}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.btn{display:inline-flex;justify-content:center;align-items:center;padding:13px 18px;border-radius:12px;font-weight:900}.primary{background:var(--blue);color:#fff}.secondary{background:#fff;border:1px solid var(--line);color:var(--dark)}.hero-box{background:#fff;border:1px solid var(--line);padding:28px;border-radius:24px;box-shadow:0 18px 40px rgba(15,23,42,.08)}.hero-box .label{font-size:11px;color:var(--muted);text-transform:uppercase;font-weight:900}.hero-box .number{font-size:54px;line-height:1;font-weight:900;margin:9px 0}.hero-box ul{list-style:none;padding:0;margin:20px 0 0}.hero-box li{padding:9px 0;border-bottom:1px solid var(--line)}
.section{padding:58px 0}.section h2{font-size:34px;line-height:1.1;margin:0 0 8px}.sub{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:23px;display:flex;flex-direction:column;min-height:365px}.thumb{margin:-23px -23px 19px;border-radius:18px 18px 0 0;overflow:hidden;background:#eef5ff}.thumb img{width:100%;display:block}.tag{font-size:11px;color:var(--blue);font-weight:900;text-transform:uppercase;letter-spacing:.06em}.card h3{font-size:22px;line-height:1.2;margin:9px 0}.card p{color:var(--muted)}.read{margin-top:auto;font-weight:900}.notice{padding:16px 18px;background:#effcf7;border-left:4px solid var(--green);border-radius:10px}
.article{max-width:900px;margin:58px auto;background:#fff;border:1px solid var(--line);border-radius:22px;padding:42px;box-shadow:0 13px 36px rgba(15,23,42,.06)}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:18px}.article h1{font-size:clamp(35px,5vw,54px);line-height:1.05;letter-spacing:-.04em;margin:8px 0 13px}.article .lead{font-size:19px;color:#475569}.article figure{margin:28px 0}.article figure img{display:block;width:100%;border-radius:18px;border:1px solid var(--line)}.article figcaption{text-align:center;color:var(--muted);font-size:13px;margin-top:8px}.article h2{font-size:29px;line-height:1.2;margin-top:34px}.article p,.article li{font-size:17px}.article table{width:100%;border-collapse:collapse;margin:24px 0}.article th,.article td{padding:11px;border:1px solid var(--line);text-align:left}.article th{background:#f8fafc}.related{border-top:1px solid var(--line);margin-top:38px;padding-top:28px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.related a{background:#f8fafc;border:1px solid var(--line);padding:14px;border-radius:12px;font-weight:800}.article-nav{display:flex;justify-content:space-between;gap:12px;margin-top:35px}
.footer{background:#0b1220;color:#cbd5e1;padding:42px 0;margin-top:56px}.footer a{color:#fff}@media(max-width:900px){.hero-grid{grid-template-columns:1fr}.grid,.related-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.nav a:not(.cta){display:none}.hero{padding:52px 0 38px}.section{padding:42px 0}.grid,.related-grid{grid-template-columns:1fr}.article{padding:25px 19px}.article-nav{flex-direction:column}}

.guide-hero{margin:30px 0 38px}.guide-hero img,.guide-figure img{display:block;width:100%;border-radius:18px;border:1px solid var(--line);background:#f5f8fc}.guide-hero figcaption,.guide-figure figcaption{text-align:center;color:var(--muted);font-size:13px;margin-top:8px}.guide-section{margin:42px 0}.guide-section h2{margin-bottom:14px}.guide-section figure{margin:25px 0 8px}.guide-section ul,.guide-section ol{padding-left:25px}.formula{background:#eef5ff;border:1px solid #cfe0ff;border-radius:12px;padding:18px;text-align:center;font-size:20px}.article blockquote{border-left:4px solid var(--blue);padding:12px 20px;background:#f8fafc;margin:25px 0}.article h3{font-size:22px;margin-top:25px}

/* Long-form educational article layout */
.guide-page{max-width:1160px}
.guide-article{max-width:none;padding:0;overflow:hidden}
.guide-header{padding:42px 48px 24px}
.guide-header h1{max-width:900px;margin-bottom:15px}
.guide-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.guide-meta span{background:#f1f5f9;border:1px solid var(--line);border-radius:999px;padding:7px 12px;font-size:12px;font-weight:800;color:#475569}
.guide-hero{margin:0 48px 38px}
.guide-hero img{width:100%;border-radius:20px;border:1px solid var(--line);display:block}
.guide-hero figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.guide-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:38px;padding:0 48px 48px}
.guide-toc{position:sticky;top:95px;align-self:start;background:#f8fafc;border:1px solid var(--line);border-radius:15px;padding:18px}
.guide-toc strong{display:block;margin-bottom:10px}
.guide-toc a{display:block;font-size:13px;font-weight:700;padding:8px 0;border-bottom:1px solid var(--line)}
.guide-content{min-width:0}
.intro-box{background:#eef5ff;border-left:5px solid var(--blue);padding:20px 24px;border-radius:12px;margin-bottom:35px}
.guide-content h2{font-size:31px;margin-top:42px}
.guide-content h3{font-size:23px;margin-top:28px}
.guide-content p,.guide-content li{font-size:17px;line-height:1.8}
.guide-content table{font-size:15px}
.guide-figure{margin:30px 0 42px;padding:0}
.guide-figure img{width:100%;border-radius:16px;border:1px solid var(--line);display:block}
.guide-figure figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:7px}
.expert-box{background:#effcf7;border:1px solid #c7f0df;border-radius:17px;padding:25px;margin-top:42px}
.faq-box{background:#fff;border:1px solid var(--line);border-radius:17px;padding:25px;margin-top:35px}
.faq-box details{border-bottom:1px solid var(--line);padding:14px 0}
.faq-box summary{cursor:pointer;font-weight:800}
.faq-box details p{margin-bottom:0}
.guide-content .notice{margin:25px 0}
@media(max-width:850px){.guide-layout{grid-template-columns:1fr;padding:0 25px 35px}.guide-toc{position:static}.guide-header{padding:30px 25px 20px}.guide-hero{margin:0 25px 30px}.guide-content h2{font-size:27px}}
@media(max-width:600px){.guide-header h1{font-size:35px}.guide-meta{display:block}.guide-meta span{display:inline-block;margin:3px}.guide-content p,.guide-content li{font-size:16px}}