:root {
  --firma-bg: #f4f0e8;
  --firma-surface: #fffaf0;
  --firma-surface-muted: #ece3d2;
  --firma-document: #f9f6ef;
  --firma-ink: #162033;
  --firma-muted: #687386;
  --firma-border: #ded2bd;
  --firma-accent: #1f5f9a;
  --firma-accent-hover: #164c7f;
  --firma-warm: #c78145;
  --firma-error: #b42318;
  --firma-success: #1f7a4d;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.firma-page {
  min-height: 100dvh;
  margin: 0;
  background:
    radial-gradient(circle at 8% 8%, color-mix(in srgb, var(--firma-warm) 22%, transparent), transparent 28rem),
    radial-gradient(circle at 92% 2%, color-mix(in srgb, var(--firma-accent) 18%, transparent), transparent 24rem),
    linear-gradient(135deg, var(--firma-bg), color-mix(in srgb, var(--firma-bg) 74%, var(--firma-surface-muted)));
  color: var(--firma-ink);
  font-family: "Source Sans 3", Aptos, system-ui, -apple-system, sans-serif;
  line-height: 1.6;
}

body.firma-page::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(color-mix(in srgb, var(--firma-ink) 8%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--firma-ink) 8%, transparent) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, rgb(0 0 0 / 0.35), transparent 70%);
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.firma-shell {
  width: min(1240px, calc(100% - var(--space-6)));
  margin: 0 auto;
  padding: var(--space-8) 0 var(--space-10);
}

.firma-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: var(--space-6);
  align-items: end;
  margin-bottom: var(--space-6);
}

.firma-kicker,
.firma-label,
.firma-step,
.firma-status {
  color: var(--firma-muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.firma-title {
  max-width: 720px;
  margin: var(--space-2) 0;
  font-size: clamp(1.9rem, 3.4vw, 3.2rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.firma-copy {
  max-width: 62ch;
  margin: 0;
  color: var(--firma-muted);
  font-size: 1rem;
}

.firma-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.firma-chip {
  padding: var(--space-4);
  border: 1px solid color-mix(in srgb, var(--firma-border) 85%, transparent);
  border-radius: 20px;
  background: color-mix(in srgb, var(--firma-surface) 78%, transparent);
  box-shadow: 0 1px 2px rgb(22 32 51 / 0.05);
  backdrop-filter: blur(16px);
}

.firma-chip strong,
.firma-chip span {
  display: block;
}

.firma-chip strong {
  margin-top: var(--space-1);
  font-size: 1rem;
  line-height: 1.25;
}

.firma-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: var(--space-6);
  align-items: start;
}

.firma-panel {
  overflow: hidden;
  border: 1px solid var(--firma-border);
  border-radius: 36px;
  background: color-mix(in srgb, var(--firma-surface) 94%, white);
  box-shadow: 0 20px 70px rgb(22 32 51 / 0.12);
}

.firma-panel-header {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--firma-border);
  background: color-mix(in srgb, var(--firma-surface-muted) 52%, transparent);
}

.firma-panel-title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.25;
}

.firma-card {
  padding: var(--space-6);
}

.firma-card h2 {
  margin: 0 0 var(--space-2);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.firma-document {
  padding: var(--space-5);
  background: var(--firma-document);
}

.firma-document-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--firma-border);
}

.firma-document-label {
  margin: 0 0 var(--space-2);
  color: var(--firma-muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.firma-document h3 {
  margin: 0;
  color: var(--firma-ink);
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.035em;
}

.firma-document-grid dt {
  display: block;
  color: var(--firma-muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.firma-document-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0;
}

.firma-document-grid div {
  padding: var(--space-3) var(--space-4);
  border: 1px solid color-mix(in srgb, var(--firma-border) 78%, transparent);
  border-radius: 16px;
  background: color-mix(in srgb, white 56%, var(--firma-surface));
}

.firma-document-grid dd {
  margin: var(--space-1) 0 0;
  color: var(--firma-ink);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
}

.firma-document-wide {
  grid-column: 1 / -1;
}

.firma-card-copy {
  margin: 0 0 var(--space-4);
  color: var(--firma-muted);
}

.firma-error {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  margin-bottom: var(--space-4);
  padding: var(--space-4);
  border: 1px solid color-mix(in srgb, var(--firma-error) 36%, var(--firma-border));
  border-radius: 20px;
  background: color-mix(in srgb, var(--firma-error) 9%, var(--firma-surface));
  color: var(--firma-error);
  font-weight: 700;
}

.firma-error:empty {
  display: none;
}

.firma-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: 999px;
  background: var(--firma-surface-muted);
}

.firma-tab-button {
  min-height: 44px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--firma-muted);
  cursor: pointer;
  font-weight: 800;
  transition: color 140ms ease-out, background 140ms ease-out, transform 140ms ease-out;
}

.firma-tab-button:hover {
  color: var(--firma-ink);
}

.firma-tab-button:active {
  transform: scale(0.98);
}

.firma-tab-button[aria-selected="true"] {
  background: var(--firma-ink);
  color: var(--firma-surface);
  box-shadow: 0 10px 30px rgb(22 32 51 / 0.18);
}

.firma-tab-button:focus-visible,
.firma-primary:focus-visible,
.firma-secondary:focus-visible,
.firma-text-input:focus-visible,
.firma-consent input:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--firma-accent) 38%, transparent);
  outline-offset: 3px;
}

.firma-tab {
  display: none;
  margin-top: var(--space-4);
}

.firma-tab.active {
  display: block;
}

.firma-canvas-wrap,
.firma-type-wrap,
.firma-upload-wrap {
  border: 1px dashed color-mix(in srgb, var(--firma-border) 84%, var(--firma-accent));
  border-radius: 28px;
  background:
    linear-gradient(
      to bottom,
      transparent calc(100% - 64px),
      color-mix(in srgb, var(--firma-border) 42%, transparent) calc(100% - 63px),
      transparent calc(100% - 62px)
    ),
    color-mix(in srgb, white 74%, var(--firma-surface));
}

.firma-canvas-wrap {
  overflow: hidden;
}

.firma-canvas {
  display: block;
  width: 100%;
  height: 200px;
  cursor: crosshair;
  touch-action: none;
}

.firma-actions {
  display: flex;
  justify-content: flex-end;
  padding: 0 var(--space-4) var(--space-4);
}

.firma-secondary {
  min-height: 40px;
  border: 1px solid var(--firma-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--firma-surface) 70%, white);
  color: var(--firma-ink);
  cursor: pointer;
  font-weight: 800;
  transition: transform 140ms ease-out, border-color 140ms ease-out, background 140ms ease-out;
}

.firma-secondary:hover {
  border-color: var(--firma-accent);
  background: white;
}

.firma-secondary:active {
  transform: translateY(1px);
}

.firma-type-wrap,
.firma-upload-wrap {
  padding: var(--space-4);
}

.firma-text-input {
  width: 100%;
  min-height: 52px;
  border: 1px solid var(--firma-border);
  border-radius: 18px;
  background: white;
  color: var(--firma-ink);
  padding: 0 var(--space-4);
}

/* Input de archivo personalizado: el nativo se oculta y el label hace de control */
.firma-upload-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.firma-upload-control {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 56px;
  padding: var(--space-2);
  border: 1px solid var(--firma-border);
  border-radius: 18px;
  background: white;
  cursor: pointer;
  transition: border-color 140ms ease-out, box-shadow 140ms ease-out;
}

.firma-upload-control:hover {
  border-color: var(--firma-accent);
}

.firma-upload-control:focus-within {
  border-color: var(--firma-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--firma-accent) 32%, transparent);
}

.firma-upload-button {
  flex: none;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 var(--space-4);
  border-radius: 999px;
  background: var(--firma-accent);
  color: white;
  font-weight: 800;
}

.firma-upload-filename {
  overflow: hidden;
  color: var(--firma-muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.firma-upload-filename[data-has-file="true"] {
  color: var(--firma-ink);
  font-weight: 600;
}

.firma-typed-preview {
  width: 100%;
  height: 150px;
  margin-top: var(--space-4);
  border-radius: 22px;
  background: color-mix(in srgb, var(--firma-surface) 80%, white);
}

.firma-upload-note {
  margin: var(--space-3) 0 0;
  color: var(--firma-muted);
  font-size: 0.9rem;
}

.firma-consent {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
  margin: var(--space-4) 0;
  padding: var(--space-4);
  border-radius: 22px;
  background: color-mix(in srgb, var(--firma-surface-muted) 54%, transparent);
  color: var(--firma-ink);
  font-weight: 700;
}

.firma-consent input {
  width: 22px;
  height: 22px;
  margin-top: 2px;
  accent-color: var(--firma-accent);
}

.firma-consent small {
  display: block;
  margin-top: var(--space-1);
  color: var(--firma-muted);
  font-weight: 500;
}

.firma-primary {
  width: 100%;
  min-height: 56px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--firma-accent), var(--firma-accent-hover));
  color: white;
  cursor: pointer;
  font-weight: 900;
  letter-spacing: 0.01em;
  box-shadow: 0 18px 38px rgb(31 95 154 / 0.26);
  transition: transform 140ms ease-out, filter 140ms ease-out, box-shadow 140ms ease-out;
}

.firma-primary:hover {
  filter: brightness(1.04);
  box-shadow: 0 22px 44px rgb(31 95 154 / 0.34);
}

.firma-primary:active {
  transform: translateY(1px) scale(0.99);
}

.firma-footnote {
  margin: var(--space-4) 0 0;
  color: var(--firma-muted);
  font-size: 0.9rem;
}

.firma-done {
  display: grid;
  place-items: center;
  min-height: 100dvh;
  padding: var(--space-6);
}

.firma-done-card {
  width: min(760px, 100%);
  padding: clamp(var(--space-8), 7vw, var(--space-16));
  border: 1px solid color-mix(in srgb, var(--firma-success) 26%, var(--firma-border));
  border-radius: 44px;
  background: color-mix(in srgb, var(--firma-surface) 94%, white);
  box-shadow: 0 30px 90px rgb(31 95 154 / 0.22);
  text-align: center;
}

.firma-done-mark {
  display: inline-grid;
  width: 72px;
  height: 72px;
  place-items: center;
  margin-bottom: var(--space-5);
  border-radius: 28px;
  background: color-mix(in srgb, var(--firma-success) 14%, var(--firma-surface));
  color: var(--firma-success);
}

.firma-done-card h1 {
  margin: 0 0 var(--space-3);
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.045em;
}

.firma-done-card p {
  max-width: 58ch;
  margin: 0 auto;
  color: var(--firma-muted);
  font-size: 1.125rem;
}

@media (max-width: 1080px) {
  .firma-hero,
  .firma-grid {
    grid-template-columns: 1fr;
  }

  .firma-summary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .firma-shell {
    width: min(100% - var(--space-4), 1240px);
    padding-top: var(--space-6);
  }

  .firma-summary,
  .firma-tabs {
    grid-template-columns: 1fr;
  }

  .firma-document-header,
  .firma-document-grid {
    grid-template-columns: 1fr;
  }

  .firma-panel {
    border-radius: 28px;
  }

  .firma-panel-header,
  .firma-card {
    padding: var(--space-4);
  }

  .firma-document {
    padding: var(--space-4);
  }

  .firma-canvas {
    height: 210px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .firma-hero,
  .firma-panel {
    animation: firma-rise 520ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .firma-panel:nth-child(2) {
    animation-delay: 80ms;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}

@keyframes firma-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

[hidden] {
  display: none !important;
}