/* ============================================================
   Smart Power Tech — Design System
   Tema: "Plano de circuito" — precisión de ingeniería eléctrica
   ============================================================ */

:root{
  /* Color */
  --bg:#0a0d13;
  --surface:#121926;
  --surface-2:#182233;
  --line:rgba(255,255,255,.08);
  --line-soft:rgba(255,255,255,.05);
  --primary:#1e3a8a;
  --primary-2:#3b5fd9;
  --accent:#d4a017;
  --accent-2:#f2c14e;
  --text:#eef1f6;
  --muted:#98a3b8;
  --muted-2:#6f7c93;
  --success:#3fb27f;
  --danger:#e0655f;

  /* Type */
  --font-display:'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body:'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  /* Layout */
  --maxw:1200px;
  --radius:14px;
  --radius-sm:8px;
  --shadow-lift:0 20px 40px -20px rgba(0,0,0,.55);
  --ease:cubic-bezier(.22,.8,.3,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}
html,body{margin:0;padding:0;font-family:var(--font-body);color:var(--text);background:var(--bg)}
body{
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:44px 44px;
  background-position:center top;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.01em}
::selection{background:var(--accent);color:#12131a}

/* Accessibility: skip link + focus */
.skip-link{
  position:absolute;left:12px;top:-60px;z-index:100;
  background:var(--accent);color:#14161d;font-weight:700;
  padding:10px 16px;border-radius:8px;transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,.nav-toggle:focus-visible{
  outline:2px solid var(--accent-2);outline-offset:3px;border-radius:6px;
}

.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- Header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(10,13,19,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{
  width:42px;height:42px;border:2px solid var(--accent);border-radius:10px;
  display:grid;place-items:center;color:var(--accent);font-weight:800;font-family:var(--font-mono);
  background:linear-gradient(135deg, rgba(212,160,23,.12), transparent);
}
.brand-name{font-weight:700;letter-spacing:.01em;font-family:var(--font-display)}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{padding:8px 14px;border-radius:8px;color:var(--muted);font-weight:500;font-size:15px;transition:background .18s var(--ease),color .18s var(--ease)}
.nav-links a:hover, .nav-links a.active{background:rgba(212,160,23,.12);color:#fff}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);border-radius:8px;width:42px;height:42px;cursor:pointer;align-items:center;justify-content:center}
.nav-toggle svg{width:20px;height:20px}

@media (max-width:860px){
  .nav-toggle{display:flex}
  .nav-links{
    position:fixed;inset:64px 0 auto 0;flex-direction:column;align-items:stretch;
    background:#0b0f16;border-bottom:1px solid var(--line);padding:10px 20px 18px;
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:transform .22s var(--ease),opacity .22s var(--ease);
  }
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-links a{padding:12px 10px;border-bottom:1px solid var(--line-soft)}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#14161d;padding:12px 20px;border-radius:10px;font-weight:700;border:none;cursor:pointer;
  font-family:var(--font-body);font-size:15px;transition:transform .18s var(--ease),box-shadow .18s var(--ease);
  box-shadow:0 0 0 rgba(212,160,23,0);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 26px -10px rgba(212,160,23,.55)}
.btn:active{transform:translateY(0)}
.btn.outline{background:transparent;color:var(--accent-2);border:1px solid rgba(212,160,23,.5)}
.btn.outline:hover{background:rgba(212,160,23,.08)}
.btn[disabled]{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none}
.btn .spinner{display:none;width:16px;height:16px;border-radius:50%;border:2px solid rgba(20,22,29,.35);border-top-color:#14161d;animation:spin .7s linear infinite}
.btn.loading .spinner{display:inline-block}
.btn.loading .btn-label{opacity:.7}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Hero ---------- */
.hero{position:relative;isolation:isolate;overflow:hidden}
.hero .bg{
  position:absolute;inset:0;
  background:
    radial-gradient(60% 80% at 50% 0%, rgba(30,58,138,.5), transparent 60%),
    linear-gradient(180deg, rgba(30,58,138,.18), transparent 55%);
}
.hero-circuit{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.9;pointer-events:none}
.hero-circuit .trace{fill:none;stroke:var(--accent);stroke-width:1.4;stroke-linecap:round;opacity:.55;
  stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 2.6s var(--ease) forwards;}
.hero-circuit .trace.trace-2{animation-delay:.25s;stroke:var(--primary-2);opacity:.4}
.hero-circuit .node{fill:var(--accent);opacity:0;animation:nodeIn .5s var(--ease) forwards}
.hero-circuit .pulse{fill:var(--accent-2)}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes nodeIn{to{opacity:1}}
.hero .content{position:relative;padding:96px 0 84px;z-index:1}
.kicker{color:var(--accent);font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-family:var(--font-mono);font-size:13px}

/* h2.kicker se usa como título de cada bloque de servicio (01 · ..., 02 · ...):
   necesita ser más grande y legible que el eyebrow del hero. */
h2.kicker{
  font-size:clamp(20px,2.6vw,26px);
  letter-spacing:.01em;
  text-transform:none;
  font-family:var(--font-display);
  color:var(--text);
  line-height:1.3;
  margin:0 0 14px;
}
.h1{font-size:clamp(34px,5.4vw,58px);line-height:1.06;margin:14px 0 18px;font-weight:700}
.lead{color:var(--muted);font-size:clamp(16px,2.1vw,19px);max-width:760px;line-height:1.6}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.badge{background:rgba(255,255,255,.05);border:1px solid var(--line);padding:8px 14px;border-radius:999px;color:#cbd5e1;font-size:13px;font-family:var(--font-mono);display:inline-flex;align-items:center;gap:8px}
.badge::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.cta{display:flex;gap:16px;flex-wrap:wrap;margin-top:28px}

/* ---------- Sections / grids ---------- */
.section{padding:72px 0}
.section .title{font-size:clamp(24px,3.4vw,32px);margin:0 0 10px;font-weight:700}
.section .subtitle{color:var(--muted);margin:0 0 28px;max-width:680px;line-height:1.6}
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:900px){.grid-3{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:border-color .2s var(--ease),transform .2s var(--ease)}
.card h3{margin:8px 0}

.features{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:1000px){.features{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.features{grid-template-columns:1fr}}
.feature{
  background:var(--surface);padding:22px;border-radius:var(--radius);border:1px solid var(--line);
  position:relative;overflow:hidden;transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.feature::before{content:'';position:absolute;left:0;top:0;bottom:0;width:2px;background:linear-gradient(180deg,var(--accent),transparent);opacity:0;transition:opacity .22s var(--ease)}
.feature:hover{transform:translateY(-4px);border-color:rgba(212,160,23,.4);box-shadow:var(--shadow-lift)}
.feature:hover::before{opacity:1}
.feature .icon{width:34px;height:34px;color:var(--accent);margin-bottom:12px}
.feature .icon svg{width:100%;height:100%}
.feature .k{color:var(--accent);font-weight:700;font-size:12px;letter-spacing:.08em;font-family:var(--font-mono)}
.feature h4{margin:8px 0 8px;font-size:18px}
.feature p{color:var(--muted);font-size:14.5px;line-height:1.6;margin:0 0 12px}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:translateY(0)}
.reveal-stagger > *{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal-stagger.in > *{opacity:1;transform:translateY(0)}
.reveal-stagger.in > *:nth-child(1){transition-delay:.03s}
.reveal-stagger.in > *:nth-child(2){transition-delay:.09s}
.reveal-stagger.in > *:nth-child(3){transition-delay:.15s}
.reveal-stagger.in > *:nth-child(4){transition-delay:.21s}
.reveal-stagger.in > *:nth-child(5){transition-delay:.27s}
.reveal-stagger.in > *:nth-child(6){transition-delay:.33s}
.reveal-stagger.in > *:nth-child(7){transition-delay:.39s}

/* ---------- Services intro (editorial headline) ---------- */
.services-intro{padding:8px 0 12px;max-width:900px}
.services-headline{
  font-size:clamp(30px,5vw,52px);line-height:1.08;font-weight:700;margin:0 0 18px;
  letter-spacing:-.01em;
}
.services-lead{color:var(--muted);font-size:clamp(16px,1.8vw,19px);line-height:1.6;max-width:760px}

/* ---------- Editorial accordion (ABB-style numbered list) ---------- */
.accordion-list{border-top:1px solid var(--line);margin:22px 0 8px}
.accordion-item{border-bottom:1px solid var(--line)}
.accordion-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:22px;
  padding:26px 4px;transition:padding-left .2s var(--ease);
}
.accordion-item summary::-webkit-details-marker{display:none}
.accordion-item summary:hover{padding-left:10px}
.accordion-item summary:focus-visible{outline:2px solid var(--accent-2);outline-offset:-2px;border-radius:8px}
.accordion-num{
  font-family:var(--font-mono);font-size:15px;color:var(--muted-2);flex:none;width:34px;
  transition:color .2s var(--ease);
}
.accordion-title{
  font-family:var(--font-display);font-weight:700;font-size:clamp(18px,2.4vw,24px);
  color:var(--text);flex:1;transition:color .2s var(--ease);
}
.accordion-chevron{width:22px;height:22px;color:var(--muted-2);flex:none;transition:transform .28s var(--ease),color .2s var(--ease)}
.accordion-item[open] .accordion-num,
.accordion-item[open] .accordion-title{color:var(--accent-2)}
.accordion-item[open] .accordion-chevron{transform:rotate(180deg);color:var(--accent-2)}
.accordion-item:hover .accordion-num{color:var(--accent)}
.accordion-body{padding:2px 4px 34px 56px;animation:accBodyIn .32s var(--ease)}
@keyframes accBodyIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
@media (max-width:640px){
  .accordion-body{padding-left:4px}
  .accordion-item summary{gap:14px}
}

/* ---------- Split ---------- */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}
@media (max-width:900px){.split{grid-template-columns:1fr}}
ul.check{padding-left:0;list-style:none;margin:18px 0}
ul.check li{margin:12px 0;padding-left:30px;position:relative;color:var(--muted);line-height:1.55}
ul.check li strong{color:var(--text)}
ul.check li::before{
  content:'';position:absolute;left:0;top:4px;width:18px;height:18px;border-radius:5px;
  background:rgba(212,160,23,.14);border:1px solid rgba(212,160,23,.4);
}
ul.check li::after{
  content:'';position:absolute;left:5px;top:8px;width:8px;height:4px;border-left:2px solid var(--accent);
  border-bottom:2px solid var(--accent);transform:rotate(-45deg);
}

/* ---------- Media card (image blocks) ---------- */
.media-card{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--surface)}
.media-card img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover}
.media-card .notice{padding:14px 16px;margin:0}

/* ---------- Proyectos (portfolio) ---------- */
.projects{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media (max-width:960px){.projects{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.projects{grid-template-columns:1fr}}
.project-card{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--surface);transition:transform .22s var(--ease),border-color .22s var(--ease)}
.project-card:hover{transform:translateY(-4px);border-color:rgba(212,160,23,.4)}
.project-card figure{margin:0;position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--surface-2)}
.project-card img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.project-card:hover img{transform:scale(1.05)}
.project-tag{position:absolute;top:12px;left:12px;background:rgba(10,13,19,.75);backdrop-filter:blur(4px);color:var(--accent-2);font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;padding:5px 10px;border-radius:999px;border:1px solid rgba(212,160,23,.35)}
.project-body{padding:18px}
.project-body h4{margin:0 0 6px;font-size:16px}
.project-body p{margin:0;color:var(--muted);font-size:14px;line-height:1.55}

/* ---------- Testimonials ---------- */
.testimonials{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media (max-width:960px){.testimonials{grid-template-columns:1fr}}
.testimonial{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:14px}
.testimonial .quote-mark{font-family:var(--font-display);font-size:34px;color:var(--accent);line-height:1;opacity:.7}
.testimonial p.quote{margin:0;color:#dbe1ea;line-height:1.6;font-size:15px}
.testimonial .who{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:6px;border-top:1px solid var(--line-soft)}
.testimonial .avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-2));display:grid;place-items:center;font-family:var(--font-mono);font-size:13px;font-weight:700;color:#fff;flex:none}
.testimonial .name{font-weight:700;font-size:14px}
.testimonial .role{color:var(--muted-2);font-size:12.5px}
.testimonial-placeholder-note{
  grid-column:1/-1;background:rgba(212,160,23,.08);border:1px dashed rgba(212,160,23,.4);
  border-radius:var(--radius-sm);padding:14px 16px;color:var(--accent-2);font-size:13.5px;line-height:1.55;
}

/* ---------- Stats strip ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:760px){.stats{grid-template-columns:1fr 1fr}}
.stat{text-align:left;padding:18px 4px;border-top:1px solid var(--line)}
.stat .num{font-family:var(--font-display);font-size:clamp(26px,3.4vw,38px);font-weight:700;color:var(--accent-2)}
.stat .label{color:var(--muted);font-size:13px;margin-top:4px}

/* ---------- Footer ---------- */
.footer{background:#080b10;border-top:1px solid var(--line);padding:40px 0 28px;margin-top:40px;color:#aab1bd}
.footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}
@media (max-width:900px){.footer .cols{grid-template-columns:1fr}}
.footer a{color:#cbd5e1;transition:color .18s var(--ease)}
.footer a:hover{color:var(--accent-2)}
.footer h4{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.footer-bottom{border-top:1px solid var(--line-soft);margin-top:28px;padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:var(--muted-2)}

/* ---------- Forms ---------- */
.form{display:grid;gap:16px}
.form label{display:block;font-size:14px;color:var(--muted);font-weight:500;margin-bottom:6px}
.field{display:flex;flex-direction:column}
.input, textarea, select{
  background:#0d121a;border:1px solid var(--line);color:#f3f4f6;padding:13px 14px;border-radius:10px;
  font-family:var(--font-body);font-size:15px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);width:100%;
}
.input:focus, textarea:focus, select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(212,160,23,.15);outline:none}
.input[aria-invalid="true"], textarea[aria-invalid="true"]{border-color:var(--danger)}
textarea{min-height:130px;resize:vertical}
.field-error{color:var(--danger);font-size:12.5px;margin-top:6px;min-height:16px}
.form-status{border-radius:10px;padding:14px 16px;font-size:14px;line-height:1.5;display:none}
.form-status.show{display:block}
.form-status.success{background:rgba(63,178,127,.12);border:1px solid rgba(63,178,127,.4);color:#a9e8cb}
.form-status.error{background:rgba(224,101,95,.12);border:1px solid rgba(224,101,95,.4);color:#f3bcb8}

.notice{font-size:12px;color:#94a3b8}
.breadcrumbs{color:#94a3b8;font-size:13px;margin-bottom:14px;font-family:var(--font-mono)}
hr.sep{border:0;border-top:1px solid var(--line);margin:28px 0}

/* ---------- Utility ---------- */
.pill-list{display:flex;flex-wrap:wrap;gap:10px}
.eyebrow{color:var(--accent);font-family:var(--font-mono);font-weight:700;font-size:12px;letter-spacing:.1em;text-transform:uppercase}