/* ══════════════════════════════════════
   ELVEN INFORMATICS — style.css
   ══════════════════════════════════════ */

/* ── DARK MODE (default) ── */
:root {
  --bg-deep:       #020d1f;
  --bg-mid:        #061530;
  --cyan:          #00c8ff;
  --cyan-glow:     #00c8ff88;
  --cyan-dim:      rgba(0,200,255,.08);
  --white:         #f0f8ff;
  --text-body:     #8ab0d8;
  --nav-bg:        rgba(2,13,31,.95);
  --card-bg:       linear-gradient(135deg,rgba(10,34,72,.8) 0%,rgba(6,21,48,.9) 100%);
  --card-border:   rgba(0,200,255,.15);
  --pillar-bg:     rgba(10,34,72,.5);
  --pillar-border: rgba(0,200,255,.1);
  --footer-border: rgba(0,200,255,.1);
  --footer-copy:   rgba(138,176,216,.5);
  --canvas-opacity:.35;
  --services-bg:   linear-gradient(180deg,#020d1f 0%,#061530 100%);
  --contact-bg:    linear-gradient(180deg,#061530 0%,#020d1f 100%);
  --h1-gradient:   linear-gradient(135deg,#ffffff 0%,#a0c8ff 50%,#00c8ff 100%);
  --title-gradient:linear-gradient(120deg,#f0f8ff 60%,#00c8ff);
  --input-bg:      rgba(6,21,48,.8);
  --input-border:  rgba(0,200,255,.2);
  --tag-bg:        rgba(0,200,255,.1);
}

/* ── LIGHT MODE ── */
html.light {
  --bg-deep:       #eaf3ff;
  --bg-mid:        #d4e9ff;
  --cyan:          #005fa3;
  --cyan-glow:     #005fa388;
  --cyan-dim:      rgba(0,95,163,.06);
  --white:         #071828;
  --text-body:     #2a527a;
  --nav-bg:        rgba(234,243,255,.97);
  --card-bg:       linear-gradient(135deg,rgba(255,255,255,.95) 0%,rgba(215,235,255,.95) 100%);
  --card-border:   rgba(0,95,163,.18);
  --pillar-bg:     rgba(255,255,255,.85);
  --pillar-border: rgba(0,95,163,.12);
  --footer-border: rgba(0,95,163,.12);
  --footer-copy:   rgba(42,82,122,.45);
  --canvas-opacity:.1;
  --services-bg:   linear-gradient(180deg,#eaf3ff 0%,#d4e9ff 100%);
  --contact-bg:    linear-gradient(180deg,#d4e9ff 0%,#eaf3ff 100%);
  --h1-gradient:   linear-gradient(135deg,#071828 0%,#1a4a8a 50%,#005fa3 100%);
  --title-gradient:linear-gradient(120deg,#071828 60%,#005fa3);
  --input-bg:      rgba(255,255,255,.9);
  --input-border:  rgba(0,95,163,.2);
  --tag-bg:        rgba(0,95,163,.08);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-deep);
  color: var(--white);
  font-family: 'Exo 2', sans-serif;
  font-weight: 300;
  overflow-x: hidden;
  transition: background .4s, color .4s;
}

/* ── CANVAS ── */
#circuit-canvas {
  position: fixed; inset: 0; z-index: 0;
  opacity: var(--canvas-opacity); pointer-events: none; transition: opacity .4s;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 5vw;
  background: var(--nav-bg);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid var(--card-border);
  transition: background .4s, border-color .4s;
}
.nav-logo {
  display: flex; align-items: center; gap: .8rem;
  font-family: 'Cinzel', serif; font-size: 1rem; letter-spacing: .12em;
  color: var(--white); text-decoration: none; transition: color .4s;
}
.nav-logo img { height: 40px; width: 40px; object-fit: contain; filter: drop-shadow(0 0 8px var(--cyan)); }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  font-size: .8rem; letter-spacing: .15em; text-transform: uppercase;
  color: var(--text-body); text-decoration: none; transition: color .2s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -4px;
  width: 0; height: 1px; background: var(--cyan); transition: width .3s;
}
.nav-links a:hover, .nav-links a.active { color: var(--cyan); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-actions { display: flex; gap: .6rem; align-items: center; }
.lang-btn, .theme-btn {
  background: transparent; border: 1px solid var(--cyan-glow);
  color: var(--cyan); border-radius: 2px; font-family: 'Exo 2', sans-serif;
  letter-spacing: .1em; cursor: pointer; transition: background .2s, box-shadow .2s;
}
.lang-btn  { padding: .4rem .9rem; font-size: .75rem; }
.theme-btn { padding: .35rem .7rem; font-size: 1rem; letter-spacing: 0; }
.lang-btn:hover, .theme-btn:hover { background: var(--cyan-glow); box-shadow: 0 0 16px var(--cyan-glow); }

/* ── MOBILE NAV ── */
.nav-toggle { display: none; background: transparent; border: 1px solid var(--cyan-glow); color: var(--cyan); padding: .4rem .6rem; cursor: pointer; border-radius: 2px; font-size: 1.1rem; }
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--nav-bg); backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--card-border);
  }
  .nav-links.open { display: flex; }
  .nav-links li a { display: block; padding: 1rem 5vw; border-bottom: 1px solid var(--card-border); }
}

/* ── SECTIONS ── */
section { position: relative; z-index: 1; padding: 7rem 5vw; }
.section-label { font-size: .7rem; letter-spacing: .3em; text-transform: uppercase; color: var(--cyan); margin-bottom: .8rem; }
.section-title {
  font-family: 'Cinzel', serif; font-size: clamp(1.5rem,3vw,2.4rem); font-weight: 700; margin-bottom: 1rem;
  background: var(--title-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.section-desc { color: var(--text-body); max-width: 560px; line-height: 1.8; margin-bottom: 3rem; }
.divider { width: 60px; height: 1px; background: linear-gradient(90deg,transparent,var(--cyan),transparent); margin: 1.2rem auto 2.4rem; }

/* ── PAGE HERO (para páginas internas) ── */
.page-hero {
  position: relative; z-index: 1;
  padding: 10rem 5vw 5rem;
  text-align: center;
  background: var(--services-bg);
}
.page-hero h1 {
  font-family: 'Cinzel', serif; font-size: clamp(2rem,4vw,3.2rem); font-weight: 900;
  background: var(--h1-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 1rem;
}
.page-hero p { color: var(--text-body); font-size: 1.05rem; max-width: 600px; margin: 0 auto; line-height: 1.8; }

/* ── CARDS ── */
.card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 4px; padding: 2.2rem 1.8rem; position: relative; overflow: hidden;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg,rgba(0,200,255,.05) 0%,transparent 60%);
  opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-6px); border-color: var(--cyan-glow); box-shadow: 0 16px 48px rgba(0,200,255,.12); }
.card:hover::before { opacity: 1; }
.card-icon { font-size: 2.2rem; margin-bottom: 1.2rem; display: block; }
.card-title { font-family: 'Cinzel', serif; font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: .8rem; letter-spacing: .05em; transition: color .4s; }
.card-text { font-size: .88rem; color: var(--text-body); line-height: 1.75; }
.card-line { position: absolute; bottom: 0; left: 0; height: 2px; width: 0; background: linear-gradient(90deg,var(--cyan),transparent); transition: width .4s; }
.card:hover .card-line { width: 100%; }

/* ── SERVICES GRID ── */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); gap: 1.5rem; }
#services { background: var(--services-bg); transition: background .4s; }

/* ── WHY ── */
#why { background: var(--bg-deep); transition: background .4s; display: flex; flex-direction: column; align-items: center; text-align: center; }
#why .section-desc { margin-left: auto; margin-right: auto; }
.pillars { display: flex; flex-wrap: wrap; gap: 2rem; justify-content: center; max-width: 900px; }
.pillar {
  display: flex; align-items: flex-start; gap: 1.2rem;
  background: var(--pillar-bg); border: 1px solid var(--pillar-border);
  border-radius: 4px; padding: 1.6rem; max-width: 260px; text-align: left;
  transition: border-color .3s, box-shadow .3s, background .4s;
}
.pillar:hover { border-color: var(--cyan-glow); box-shadow: 0 8px 32px rgba(0,200,255,.1); }
.pillar-icon { font-size: 1.6rem; flex-shrink: 0; }
.pillar-title { font-family: 'Cinzel', serif; font-size: .9rem; margin-bottom: .4rem; color: var(--cyan); }
.pillar-text { font-size: .83rem; color: var(--text-body); line-height: 1.7; }

/* ── CONTACT ── */
#contact { background: var(--contact-bg); transition: background .4s; text-align: center; display: flex; flex-direction: column; align-items: center; }
.social-btns { display: flex; gap: 1.2rem; flex-wrap: wrap; justify-content: center; margin-top: 2.4rem; }
.btn-social {
  display: inline-flex; align-items: center; gap: .7rem; padding: .85rem 2rem;
  border: 1px solid var(--card-border); background: var(--cyan-dim);
  color: var(--white); text-decoration: none; border-radius: 2px;
  font-family: 'Exo 2', sans-serif; font-size: .85rem; letter-spacing: .1em; text-transform: uppercase;
  transition: background .3s, border-color .3s, box-shadow .3s, color .4s; cursor: pointer;
}
.btn-social:hover { background: rgba(0,200,255,.15); border-color: var(--cyan); box-shadow: 0 0 24px rgba(0,200,255,.2); }
.btn-social svg { width: 20px; height: 20px; fill: currentColor; }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: .6rem; padding: .9rem 2.2rem;
  background: linear-gradient(135deg,var(--cyan) 0%,#0072ff 100%);
  color: #020d1f; font-family: 'Exo 2', sans-serif; font-weight: 600;
  font-size: .88rem; letter-spacing: .12em; text-transform: uppercase;
  text-decoration: none; border-radius: 2px; border: none; cursor: pointer;
  box-shadow: 0 0 24px rgba(0,200,255,.5); transition: box-shadow .3s, transform .2s;
}
.btn-primary:hover { box-shadow: 0 0 40px rgba(0,200,255,.8); transform: translateY(-2px); }
.btn-outline {
  display: inline-flex; align-items: center; gap: .6rem; padding: .8rem 2rem;
  border: 1px solid var(--cyan); color: var(--cyan); background: transparent;
  font-family: 'Exo 2', sans-serif; font-size: .85rem; letter-spacing: .1em; text-transform: uppercase;
  text-decoration: none; border-radius: 2px; cursor: pointer;
  transition: background .2s, box-shadow .2s;
}
.btn-outline:hover { background: var(--cyan-glow); box-shadow: 0 0 20px var(--cyan-glow); }

/* ── FOOTER ── */
footer {
  position: relative; z-index: 1; border-top: 1px solid var(--footer-border);
  padding: 2.5rem 5vw; display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1.5rem; transition: border-color .4s;
  background: var(--bg-deep);
}
.footer-brand { font-family: 'Cinzel', serif; font-size: .8rem; letter-spacing: .15em; color: var(--text-body); }
.footer-links { display: flex; gap: 2rem; }
.footer-links a { font-size: .75rem; color: var(--text-body); text-decoration: none; letter-spacing: .1em; text-transform: uppercase; transition: color .2s; }
.footer-links a:hover { color: var(--cyan); }
.footer-copy  { font-size: .75rem; color: var(--footer-copy); letter-spacing: .08em; }

/* ── PRICING ── */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 1.5rem; max-width: 1100px; margin: 0 auto; }
.pricing-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 4px; padding: 2.5rem 2rem; position: relative; overflow: hidden;
  transition: transform .3s, border-color .3s, box-shadow .3s;
  display: flex; flex-direction: column;
}
.pricing-card.featured {
  border-color: var(--cyan); box-shadow: 0 0 40px rgba(0,200,255,.15);
}
.pricing-card.featured::after {
  content: 'MÁS POPULAR'; position: absolute; top: 1.2rem; right: -2rem;
  background: var(--cyan); color: #020d1f; font-size: .6rem; font-weight: 700;
  letter-spacing: .15em; padding: .3rem 2.5rem; transform: rotate(35deg);
}
.pricing-card:hover { transform: translateY(-6px); border-color: var(--cyan-glow); box-shadow: 0 16px 48px rgba(0,200,255,.12); }
.pricing-service { font-size: .65rem; letter-spacing: .25em; text-transform: uppercase; color: var(--cyan); margin-bottom: .5rem; }
.pricing-name { font-family: 'Cinzel', serif; font-size: 1.3rem; font-weight: 700; color: var(--white); margin-bottom: 1.5rem; }
.pricing-price { font-size: 2rem; font-weight: 700; color: var(--cyan); margin-bottom: .3rem; line-height: 1; }
.pricing-price span { font-size: .85rem; font-weight: 300; color: var(--text-body); }
.pricing-desc { font-size: .82rem; color: var(--text-body); margin-bottom: 1.8rem; line-height: 1.6; }
.pricing-features { list-style: none; margin-bottom: 2rem; flex: 1; }
.pricing-features li { font-size: .83rem; color: var(--text-body); padding: .5rem 0; border-bottom: 1px solid var(--card-border); display: flex; gap: .6rem; align-items: flex-start; }
.pricing-features li::before { content: '→'; color: var(--cyan); flex-shrink: 0; }
.pricing-note { font-size: .72rem; color: var(--text-body); opacity: .6; margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--card-border); }

/* ── FAQ ── */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--card-border); border-radius: 4px; margin-bottom: 1rem;
  background: var(--card-bg); overflow: hidden; transition: border-color .3s;
}
.faq-item:hover { border-color: var(--cyan-glow); }
.faq-question {
  width: 100%; text-align: left; background: transparent; border: none; cursor: pointer;
  padding: 1.4rem 1.8rem; display: flex; justify-content: space-between; align-items: center;
  font-family: 'Exo 2', sans-serif; font-size: .95rem; color: var(--white); font-weight: 400;
  transition: color .2s;
}
.faq-question:hover { color: var(--cyan); }
.faq-question .faq-icon { color: var(--cyan); font-size: 1.2rem; transition: transform .3s; flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .4s ease, padding .3s;
  font-size: .88rem; color: var(--text-body); line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 400px; padding: 0 1.8rem 1.4rem; }
.faq-category { font-size: .65rem; letter-spacing: .25em; text-transform: uppercase; color: var(--cyan); margin: 3rem 0 1rem; display: block; }

/* ── BLOG ── */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(320px,1fr)); gap: 2rem; max-width: 1100px; margin: 0 auto; }
.blog-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 4px; overflow: hidden;
  transition: transform .3s, border-color .3s, box-shadow .3s;
  display: flex; flex-direction: column;
}
.blog-card:hover { transform: translateY(-6px); border-color: var(--cyan-glow); box-shadow: 0 16px 48px rgba(0,200,255,.12); }
.blog-thumb {
  height: 200px; background: linear-gradient(135deg, rgba(0,200,255,.1), rgba(0,114,255,.1));
  display: flex; align-items: center; justify-content: center;
  font-size: 3.5rem; border-bottom: 1px solid var(--card-border);
}
.blog-body { padding: 1.8rem; flex: 1; display: flex; flex-direction: column; }
.blog-meta { display: flex; gap: 1rem; margin-bottom: 1rem; }
.blog-tag {
  font-size: .62rem; letter-spacing: .2em; text-transform: uppercase;
  background: var(--tag-bg); color: var(--cyan); padding: .25rem .7rem; border-radius: 2px;
}
.blog-date { font-size: .72rem; color: var(--text-body); }
.blog-title { font-family: 'Cinzel', serif; font-size: 1.05rem; color: var(--white); margin-bottom: .8rem; line-height: 1.4; }
.blog-excerpt { font-size: .85rem; color: var(--text-body); line-height: 1.75; flex: 1; margin-bottom: 1.5rem; }
.blog-read { font-size: .75rem; letter-spacing: .15em; text-transform: uppercase; color: var(--cyan); text-decoration: none; transition: gap .2s; display: inline-flex; align-items: center; gap: .4rem; }
.blog-read:hover { gap: .7rem; }

/* ── CONTACT FORM ── */
.contact-form { max-width: 640px; margin: 0 auto; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-bottom: 1.2rem; }
.form-group { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1.2rem; }
.form-group label { font-size: .72rem; letter-spacing: .15em; text-transform: uppercase; color: var(--cyan); }
.form-group input, .form-group textarea, .form-group select {
  background: var(--input-bg); border: 1px solid var(--input-border);
  color: var(--white); font-family: 'Exo 2', sans-serif; font-size: .88rem;
  padding: .8rem 1rem; border-radius: 2px; outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--cyan); box-shadow: 0 0 16px rgba(0,200,255,.15);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-group select option { background: #061530; }
.form-msg { font-size: .82rem; padding: .8rem 1rem; border-radius: 2px; margin-bottom: 1rem; display: none; }
.form-msg.success { background: rgba(0,255,128,.1); border: 1px solid rgba(0,255,128,.3); color: #00ff80; display: block; }
.form-msg.error   { background: rgba(255,80,80,.1); border: 1px solid rgba(255,80,80,.3); color: #ff5050; display: block; }

/* ── COOKIE BANNER ── */
#cookie-banner {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 300;
  background: linear-gradient(90deg, #020d1f 0%, #0a2248 50%, #020d1f 100%);
  border-top: 1px solid #00c8ff44;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: .8rem 2rem;
  font-family: 'Exo 2', sans-serif;
  backdrop-filter: blur(8px);
}
#cookie-banner span { font-size:.75rem; color:#8ab0d8; line-height:1.5; max-width: 75%; }
#cookie-banner button {
  background: #00c8ff; color: #020d1f; border: none; border-radius: 4px;
  padding: .4rem 1.1rem; font-size: .75rem; font-family: 'Exo 2', sans-serif;
  font-weight: 700; cursor: pointer; letter-spacing: .05em; flex-shrink: 0;
}

/* ── REVEAL ANIMATIONS ── */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s, transform .6s; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  footer { justify-content: center; text-align: center; }
  .footer-links { justify-content: center; flex-wrap: wrap; gap: 1rem; }
  .form-row { grid-template-columns: 1fr; }
  #cookie-banner { flex-direction: column; align-items: flex-start; padding: 1rem 1.2rem; gap: .8rem; }
  #cookie-banner span { max-width: 100%; }
  .pricing-card.featured::after { display: none; }
}