:root {
  --canvas: #ffffff;
  --soft: #f6f9fc;
  --cream: #f5e9d4;
  --ink: #0d253d;
  --ink-2: #273951;
  --mute: #64748d;
  --hairline: #e3e8ee;
  --input: #a8c3de;
  --primary: #533afd;
  --primary-press: #2e2b8c;
  --ruby: #ea2261;
  --magenta: #f96bee;
  --lavender: #b9b9f9;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 300 16px/1.5 "Inter", system-ui, sans-serif;
  font-feature-settings: "ss01";
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-weight: 300; margin: 0 0 16px; }
h1 { font-size: clamp(36px, 8vw, 56px); line-height: 1.05; letter-spacing: -0.025em; }
h2 { font-size: clamp(28px, 5vw, 40px); line-height: 1.12; letter-spacing: -0.02em; }
h3 { font-size: 20px; line-height: 1.3; letter-spacing: -0.01em; font-weight: 400; }
p { margin: 0 0 16px; max-width: 62ch; }
a { color: var(--primary); }

:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 720px; }
.center { text-align: center; }
.center p { margin-left: auto; margin-right: auto; }

/* header */
.top { position: relative; z-index: 2; }
.top__inner { display: flex; justify-content: space-between; align-items: center; height: 64px; }
.logo { color: var(--ink); text-decoration: none; font-weight: 500; font-size: 20px; letter-spacing: -0.02em; }
.top__link { color: var(--ink-2); text-decoration: none; font-size: 15px; display: inline-flex; align-items: center; min-height: 44px; }

/* hero */
.hero { position: relative; margin-top: -64px; padding: 80px 0 64px; overflow: hidden; }
.mesh {
  position: absolute; inset: 0 0 35% 0; z-index: 0;
  background:
    radial-gradient(40% 60% at 12% 20%, #ffd9a8 0%, transparent 70%),
    radial-gradient(35% 55% at 45% 0%, var(--lavender) 0%, transparent 70%),
    radial-gradient(35% 60% at 75% 25%, var(--magenta) 0%, transparent 65%),
    radial-gradient(30% 50% at 95% 5%, var(--primary) 0%, transparent 70%),
    radial-gradient(30% 45% at 60% 55%, var(--ruby) 0%, transparent 70%);
  opacity: 0.55;
}
.hero__grid { position: relative; z-index: 1; display: grid; gap: 40px; align-items: center; }
.hero__copy h1 { margin-bottom: 12px; }
.hero__copy .signup { margin-top: 16px; }
.lead { font-size: 18px; color: var(--ink-2); }
.fine { font-size: 13px; color: var(--mute); margin-top: 12px; }

/* signup */
.signup { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.center .signup { justify-content: center; }
.signup input {
  flex: 1 1 220px; min-height: 48px; padding: 0 16px;
  border: 1px solid var(--mute); border-radius: 6px;
  font: inherit; color: var(--ink); background: #fff;
}
.signup button {
  min-height: 48px; padding: 8px 22px; border: 0; border-radius: 9999px;
  background: var(--primary); color: #fff; font: 400 16px "Inter", sans-serif; cursor: pointer;
}
.signup button:hover { background: var(--primary-press); }
.signup__ok { flex-basis: 100%; margin: 4px 0 0; color: var(--ink-2); }

/* invoice mockup: the one memorable element */
.invoice {
  margin: 0; background: #fff; border-radius: 12px; padding: 28px;
  box-shadow: rgba(0, 55, 112, 0.08) 0 8px 24px, rgba(0, 55, 112, 0.04) 0 2px 6px;
  font-feature-settings: "ss01", "tnum";
  max-width: 440px; justify-self: center; width: 100%;
}
.invoice p { margin: 0; }
.invoice__head { display: flex; justify-content: space-between; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--hairline); }
.invoice__who { font-weight: 400; }
.invoice__meta, .invoice__num, .invoice__to { font-size: 13px; color: var(--mute); }
.invoice__num { white-space: nowrap; }
.invoice__to { margin: 16px 0 8px !important; }
.invoice__lines { width: 100%; border-collapse: collapse; font-size: 15px; }
.invoice__lines td { padding: 8px 0; }
.invoice__lines td:last-child { text-align: right; letter-spacing: -0.02em; }
.invoice__lines tfoot td { border-top: 1px solid var(--hairline); padding-top: 14px; font-size: 22px; font-weight: 400; }
.invoice__foot { display: flex; align-items: center; gap: 16px; margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--hairline); }
.qr { width: 56px; height: 56px; color: var(--ink); flex: none; }
.stamp { font-size: 14px; font-weight: 500; color: var(--primary); }
.stamp span { font-weight: 300; color: var(--mute); font-size: 13px; }

@media (prefers-reduced-motion: no-preference) {
  .stamp { animation: stamp 0.5s 0.8s both ease-out; }
  @keyframes stamp { from { opacity: 0; transform: translateY(6px); } }
}

/* bands */
.band { padding: 72px 0; }
.band--soft { background: var(--soft); }
.band--cream { background: var(--cream); }

.steps { list-style: none; counter-reset: step; padding: 0; margin: 32px 0 0; display: grid; gap: 32px; }
.steps li { counter-increment: step; position: relative; padding-left: 52px; }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: -2px;
  width: 36px; height: 36px; border-radius: 9999px; border: 1px solid var(--primary);
  color: var(--primary); display: grid; place-items: center; font-weight: 400;
}
.steps p, .benefits p { color: var(--ink-2); }

.benefits { display: grid; gap: 32px; margin-top: 32px; }

details { border-bottom: 1px solid var(--hairline); padding: 18px 0; }
details:first-of-type { border-top: 1px solid var(--hairline); margin-top: 24px; }
summary { cursor: pointer; font-size: 18px; font-weight: 400; list-style-position: inside; }
details p { margin: 12px 0 0; color: var(--ink-2); }

/* footer */
.foot { padding: 32px 0; font-size: 13px; color: var(--mute); border-top: 1px solid var(--hairline); }
.foot__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
.foot p { margin: 0; }
.foot nav { display: flex; gap: 8px; }
.foot a { color: var(--mute); display: inline-flex; align-items: center; min-height: 44px; padding: 0 6px; }

@media (min-width: 860px) {
  .hero { padding: 112px 0; }
  .hero__grid { grid-template-columns: 1.1fr 1fr; gap: 64px; }
  .band { padding: 96px 0; }
  .steps, .benefits { grid-template-columns: repeat(3, 1fr); }
}

/* botones y CTAs */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 8px 22px; border: 0; border-radius: 9999px;
  background: var(--primary); color: #fff; font: 400 16px "Inter", sans-serif;
  text-decoration: none; cursor: pointer;
}
.btn:hover { background: var(--primary-press); }
.btn--ghost { background: transparent; color: var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
.btn--ghost:hover { background: var(--soft); }
.btn-link { background: none; border: 0; color: var(--ink-2); font: inherit; font-size: 15px; min-height: 44px; cursor: pointer; }
.btn-link:hover { color: var(--primary); }
.cta { margin-top: 24px; }

/* precios */
.plans { display: grid; gap: 24px; margin-top: 32px; }
.plan { background: #fff; border: 1px solid var(--hairline); border-radius: 12px; padding: 28px; }
.plan--pro { border-color: var(--primary); box-shadow: rgba(83, 58, 253, 0.12) 0 8px 24px; }
.plan__price { font-size: 40px; letter-spacing: -0.02em; margin: 8px 0 16px; font-feature-settings: "tnum"; }
.plan__price span { font-size: 16px; color: var(--mute); }
.plan ul { padding-left: 20px; margin: 0 0 24px; color: var(--ink-2); }

/* app */
.app { background: var(--soft); }
.app__main { padding: 32px 20px 64px; }
.app__grid { display: grid; gap: 24px; align-items: start; }
.card { background: #fff; border-radius: 12px; padding: 28px; box-shadow: rgba(0, 55, 112, 0.08) 0 8px 24px, rgba(0, 55, 112, 0.04) 0 2px 6px; }
.auth { max-width: 440px; margin: 48px auto; }
.auth h1 { font-size: 32px; }
.stack { display: grid; gap: 16px; }
.stack label { display: grid; gap: 6px; font-size: 14px; color: var(--ink-2); }
.stack input {
  min-height: 48px; padding: 0 14px; border: 1px solid var(--mute); border-radius: 6px;
  font: inherit; color: var(--ink); background: #fff; width: 100%;
}
.row { display: flex; flex-wrap: wrap; gap: 12px; }
.row > label { flex: 1 1 100px; }
.stack .invoice__lines { font-feature-settings: "tnum"; }
.msg { margin: 0; min-height: 1.5em; color: var(--ruby); font-size: 14px; }
.top__user { display: flex; align-items: center; gap: 12px; }
.badge { font-size: 13px; padding: 4px 10px; border-radius: 9999px; background: var(--hairline); color: var(--ink-2); }
.badge--pro { background: var(--primary); color: #fff; }
.limit { margin-top: 20px; padding: 20px; border-radius: 12px; background: var(--cream); }
.limit p { margin-bottom: 12px; }
.inv-list { list-style: none; padding: 0; margin: 0; }
.inv-list li { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--hairline); }
.inv-list p { margin: 0; }
.inv-list .fine { margin: 0; }
.inv-list__total { font-weight: 400; font-feature-settings: "tnum"; white-space: nowrap; }

@media (min-width: 860px) {
  .plans { grid-template-columns: repeat(2, 1fr); max-width: 760px; margin-left: auto; margin-right: auto; }
  .app__grid { grid-template-columns: 1fr 1fr; }
}