/* ===== Arcane Lab — estudio digital ===== */
:root {
  --bg: #0a0a0c;
  --bg-soft: #101015;
  --panel: #131319;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --ink: #f4f3f1;
  --muted: #a2a1ad;
  --muted-dim: #74737e;
  --accent: #8b78ff;
  --accent-2: #c9a8ff;
  --accent-soft: rgba(139, 120, 255, 0.14);
  --radius: 18px;
  --maxw: 1120px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

/* subtle film grain / vignette */
.grain {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(139,120,255,0.10), transparent 60%),
    radial-gradient(80% 60% at 100% 100%, rgba(201,168,255,0.06), transparent 55%);
}

a { color: inherit; text-decoration: none; }
em { font-style: italic; }
::selection { background: var(--accent-soft); color: #fff; }

/* ===== Layout helpers ===== */
main { position: relative; z-index: 1; }
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(72px, 12vw, 140px) clamp(20px, 5vw, 40px);
}
.eyebrow {
  font-size: 0.78rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent-2); font-weight: 600; margin-bottom: 18px;
}
.section-head { max-width: 720px; margin-bottom: clamp(40px, 6vw, 64px); }
.section-title {
  font-family: "Fraunces", Georgia, serif; font-weight: 500;
  font-size: clamp(1.9rem, 4.2vw, 3rem); line-height: 1.08; letter-spacing: -0.01em;
}

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--maxw); margin: 0 auto;
  padding: 18px clamp(20px, 5vw, 40px);
  backdrop-filter: blur(10px);
}
.nav::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--line); transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease);
}
.nav.scrolled { background: rgba(10,10,12,0.72); }
.nav.scrolled::after { transform: scaleX(1); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.01em; }
.brand-mark { color: var(--accent); display: inline-flex; }
.brand-name { font-size: 1.02rem; }
.brand.small .brand-name { font-size: .95rem; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--muted); font-size: 0.95rem; font-weight: 500; transition: color .2s var(--ease); }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  color: var(--ink) !important; border: 1px solid var(--line-strong);
  padding: 9px 18px; border-radius: 999px; transition: border-color .2s var(--ease), background .2s var(--ease);
}
.nav-cta:hover { border-color: var(--accent); background: var(--accent-soft); }
.nav-burger { display: none; background: none; border: 0; cursor: pointer; width: 40px; height: 40px; flex-direction: column; gap: 6px; align-items: center; justify-content: center; }
.nav-burger span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .3s var(--ease), opacity .3s var(--ease); }

/* ===== Hero ===== */
.hero {
  position: relative; max-width: var(--maxw); margin: 0 auto;
  padding: clamp(70px, 12vw, 150px) clamp(20px, 5vw, 40px) clamp(40px, 7vw, 90px);
}
.hero-glow {
  position: absolute; top: -120px; left: 50%; transform: translateX(-50%);
  width: min(900px, 90vw); height: 420px; pointer-events: none;
  background: radial-gradient(50% 50% at 50% 50%, rgba(139,120,255,0.22), transparent 70%);
  filter: blur(20px);
}
.hero-title {
  position: relative; font-family: "Fraunces", Georgia, serif; font-weight: 500;
  font-size: clamp(2.4rem, 6.4vw, 4.6rem); line-height: 1.02; letter-spacing: -0.02em;
  max-width: 18ch;
}
.hero-title em { color: transparent; background: linear-gradient(100deg, var(--accent-2), var(--accent)); -webkit-background-clip: text; background-clip: text; }
.hero-sub { margin-top: 26px; max-width: 56ch; color: var(--muted); font-size: clamp(1.02rem, 1.6vw, 1.2rem); }
.hero-actions { margin-top: 38px; display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 24px; border-radius: 999px; font-weight: 600; font-size: 0.97rem;
  cursor: pointer; border: 1px solid transparent; transition: transform .15s var(--ease), background .2s var(--ease), border-color .2s var(--ease), box-shadow .25s var(--ease);
}
.btn-primary { background: var(--accent); color: #0c0a16; box-shadow: 0 10px 30px -12px rgba(139,120,255,0.7); }
.btn-primary:hover { background: var(--accent-2); transform: translateY(-2px); }
.btn-ghost { color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateY(-2px); }
.btn-block { width: 100%; padding: 15px; }
.btn[disabled] { opacity: .55; cursor: not-allowed; transform: none; }

/* ===== Cards (servicios) ===== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  position: relative; background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px;
  transition: border-color .3s var(--ease), transform .3s var(--ease), background .3s var(--ease);
}
.card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.card-ic {
  display: inline-flex; width: 46px; height: 46px; align-items: center; justify-content: center;
  border-radius: 12px; background: var(--accent-soft); color: var(--accent-2); margin-bottom: 20px;
}
.card-ic svg { width: 24px; height: 24px; }
.card h3 { font-size: 1.18rem; font-weight: 600; margin-bottom: 10px; letter-spacing: -0.01em; }
.card p { color: var(--muted); font-size: 0.98rem; }

/* ===== Steps (proceso) ===== */
.steps { list-style: none; display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; counter-reset: s; }
.steps li {
  border-top: 1px solid var(--line-strong); padding-top: 20px;
  transition: border-color .3s var(--ease);
}
.steps li:hover { border-color: var(--accent); }
.step-n { font-family: "Fraunces", serif; font-size: 1.05rem; color: var(--accent-2); display: block; margin-bottom: 14px; }
.steps h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.steps p { color: var(--muted); font-size: 0.92rem; }

/* ===== Band (estudio) ===== */
.band { max-width: 100%; }
.band-inner {
  max-width: var(--maxw); margin: 0 auto; padding: clamp(48px, 7vw, 80px) clamp(24px, 5vw, 56px);
  background: linear-gradient(135deg, rgba(139,120,255,0.10), rgba(201,168,255,0.04));
  border: 1px solid var(--line); border-radius: 26px;
}
.band-title { font-family: "Fraunces", serif; font-weight: 500; font-size: clamp(1.8rem, 4vw, 2.8rem); line-height: 1.08; letter-spacing: -0.01em; }
.band-title em { color: var(--accent-2); }
.band-text { margin-top: 22px; max-width: 60ch; color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.12rem); }

/* ===== Contact form ===== */
.contact-lead { margin-top: 12px; color: var(--muted); }
.form {
  max-width: 640px; display: grid; gap: 18px;
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--line); border-radius: 24px; padding: clamp(24px, 4vw, 38px);
}
.field { display: grid; gap: 8px; }
.field label { font-size: 0.9rem; font-weight: 500; color: var(--muted); }
.field .opt { color: var(--muted-dim); font-weight: 400; }
.field input, .field textarea {
  width: 100%; background: #0c0c11; border: 1px solid var(--line-strong); color: var(--ink);
  border-radius: 12px; padding: 13px 15px; font: inherit; font-size: 0.98rem;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: var(--muted-dim); }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field textarea { resize: vertical; min-height: 120px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { min-height: 1.2em; font-size: 0.95rem; text-align: center; color: var(--muted); }
.form-note.ok { color: #6ee7b7; }
.form-note.err { color: #fca5a5; }

/* ===== Footer ===== */
.footer { position: relative; z-index: 1; border-top: 1px solid var(--line); max-width: var(--maxw); margin: 0 auto; padding: 44px clamp(20px, 5vw, 40px); }
.footer-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 18px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--muted); font-size: 0.92rem; transition: color .2s var(--ease); }
.footer-links a:hover { color: var(--ink); }
.footer-fine { margin-top: 22px; color: var(--muted-dim); font-size: 0.85rem; }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ===== Light theme (same brand, white background) ===== */
body.theme-light {
  --bg: #ffffff;
  --bg-soft: #f6f5fb;
  --panel: #ffffff;
  --line: rgba(20, 18, 40, 0.10);
  --line-strong: rgba(20, 18, 40, 0.16);
  --ink: #16151d;
  --muted: #585766;
  --muted-dim: #8b8a98;
  --accent: #6f5cf0;
  --accent-2: #5a45e0;
  --accent-soft: rgba(111, 92, 240, 0.10);
}
body.theme-light .grain {
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(111,92,240,0.10), transparent 55%),
    radial-gradient(70% 50% at 100% 0%, rgba(111,92,240,0.05), transparent 60%);
}
body.theme-light .hero-glow {
  background: radial-gradient(50% 50% at 50% 50%, rgba(111,92,240,0.16), transparent 70%);
}
body.theme-light .nav.scrolled { background: rgba(255, 255, 255, 0.82); }
body.theme-light .card,
body.theme-light .form {
  background: #ffffff;
  box-shadow: 0 18px 40px -28px rgba(40, 30, 90, 0.28);
}
body.theme-light .card:hover { box-shadow: 0 24px 50px -28px rgba(40, 30, 90, 0.34); }
body.theme-light .band-inner {
  background: linear-gradient(135deg, rgba(111,92,240,0.09), rgba(111,92,240,0.03));
}
body.theme-light .btn-primary { color: #ffffff; box-shadow: 0 12px 30px -12px rgba(111,92,240,0.55); }
body.theme-light .field input,
body.theme-light .field textarea { background: #fbfbfe; color: var(--ink); }
body.theme-light .nav-links { /* mobile menu panel on light */ }
@media (max-width: 680px) {
  body.theme-light .nav-links { background: rgba(255,255,255,0.98); }
}
body.theme-light .form-note.ok { color: #138a5e; }
body.theme-light .form-note.err { color: #c0392b; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .nav-links { position: fixed; inset: 64px 16px auto 16px; flex-direction: column; align-items: stretch; gap: 6px;
    background: rgba(16,16,21,0.97); border: 1px solid var(--line); border-radius: 16px; padding: 14px;
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: opacity .25s var(--ease), transform .25s var(--ease); }
  .nav-links.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { padding: 10px 8px; }
  .nav-cta { text-align: center; }
  .nav-burger { display: flex; }
  .nav-burger.open span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav-burger.open span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .cards { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}