/* Fonts loaded via assets/css/fonts.css (local) */

/* ============================================================
   validator.es — main.css
   Design system v3.0
   Fonts: Libre Baskerville (headings) · Source Sans 3 (body) · JetBrains Mono (code/PTC)
   Accent: #8b6bbf (violet — protocolo node)
   ============================================================ */

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Tokens ──────────────────────────────────────────────── */
:root {
  --accent:        #8b6bbf;
  --accent-dark:   #6b4fa0;
  --accent-light:  #f0ecf8;
  --accent-border: #c4b0e8;

  --ink:           #1a1a2e;
  --ink-muted:     #4b5563;
  --ink-faint:     #9ca3af;

  --surface:       #ffffff;
  --surface-alt:   #f8f7ff;
  --surface-code:  #1e1b2e;

  --border:        #e5e7eb;
  --border-strong: #d1d5db;

  --green:  #16a34a;
  --green-bg: #f0fdf4;
  --green-border: #86efac;
  --yellow: #b45309;
  --yellow-bg: #fffbeb;
  --yellow-border: #fcd34d;
  --red:    #dc2626;
  --red-bg: #fef2f2;
  --red-border: #fca5a5;

  --radius:   6px;
  --radius-lg: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --shadow:    0 4px 12px rgba(0,0,0,.08), 0 1px 3px rgba(0,0,0,.05);

  --font-head: 'Libre Baskerville', Georgia, serif;
  --font-body: 'Source Sans 3', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --max-w: 820px;
  --nav-h: 64px;
}

/* ── Base ────────────────────────────────────────────────── */
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  color: var(--ink);
  background: var(--surface);
}

/* ── Typography ──────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.4rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.3rem, 3vw, 1.75rem); margin: 2rem 0 .75rem; }
h3 { font-size: 1.15rem; margin: 1.5rem 0 .5rem; }

p  { margin-bottom: 1rem; color: var(--ink-muted); }
p:last-child { margin-bottom: 0; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--accent-dark); }

ul, ol { margin: 0 0 1rem 1.5rem; }
li { margin-bottom: .35rem; color: var(--ink-muted); }

strong { color: var(--ink); font-weight: 600; }

/* ── Layout ──────────────────────────────────────────────── */
body > header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

body > header nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.01em;
  white-space: nowrap;
}
.logo:hover { text-decoration: none; color: var(--accent); }
.logo::first-letter {
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--accent);
  margin-right: .05em;
}

.nav-links {
  display: flex;
  gap: .25rem;
  list-style: none;
  margin: 0;
}

.nav-links a {
  display: block;
  padding: .35rem .65rem;
  font-size: .875rem;
  font-weight: 500;
  color: var(--ink-muted);
  border-radius: var(--radius);
  transition: background .15s, color .15s;
}
.nav-links a:hover { color: var(--ink); background: var(--surface-alt); text-decoration: none; }
.nav-links a.active { color: var(--accent); background: var(--accent-light); }

.lang-selector {
  display: flex;
  gap: .25rem;
  flex-shrink: 0;
}

.lang-btn {
  background: none;
  border: 1px solid var(--border-strong);
  padding: .2rem .5rem;
  cursor: pointer;
  font-size: .8rem;
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--ink-muted);
  border-radius: var(--radius);
  transition: background .15s, color .15s, border-color .15s;
}
.lang-btn:hover { color: var(--accent); border-color: var(--accent-border); }
.lang-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .65rem 1.4rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, box-shadow .15s;
  box-shadow: 0 1px 3px rgba(139,107,191,.3);
}
.btn:hover { background: var(--accent-dark); text-decoration: none; color: #fff; }
.btn:active { transform: translateY(1px); }

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { background: var(--surface-alt); color: var(--ink); border-color: var(--accent-border); }

.cta-buttons {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin: 1.75rem 0;
}

/* ── Cards / Columns ─────────────────────────────────────── */
.three-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.column {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}
.column h3 { margin-top: 0; font-size: 1rem; }
.column p  { font-size: .9rem; margin-bottom: 0; }

/* ── Step containers ─────────────────────────────────────── */
.step-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.25rem 0;
  box-shadow: var(--shadow-sm);
}

.step-label {
  font-size: .75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 1rem;
}

/* ── Forms ───────────────────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-weight: 600;
  font-size: .9rem;
  color: var(--ink);
  margin-bottom: .4rem;
}

.form-group input[type="text"],
.form-group input[type="date"],
.form-group select,
.form-group textarea {
  width: 100%;
  max-width: 560px;
  padding: .55rem .75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: .95rem;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--surface);
  transition: border-color .15s, box-shadow .15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139,107,191,.12);
}

.form-group textarea { min-height: 90px; resize: vertical; }

.helper-text {
  font-size: .8rem;
  color: var(--ink-faint);
  margin-top: .3rem;
  line-height: 1.5;
}

.warning-text { color: var(--yellow); font-size: .8rem; margin-top: .3rem; }

.file-input-wrapper { margin: 1.5rem 0; }

.file-input-wrapper label {
  display: block;
  font-weight: 600;
  font-size: .9rem;
  color: var(--ink);
  margin-bottom: .4rem;
}

.file-input-wrapper input[type="file"] {
  display: block;
  padding: .5rem .6rem;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  width: 100%;
  max-width: 480px;
  font-family: var(--font-body);
  font-size: .9rem;
  cursor: pointer;
  transition: border-color .15s;
}
.file-input-wrapper input[type="file"]:hover { border-color: var(--accent); }

.optional-section {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.optional-section summary {
  cursor: pointer;
  padding: .65rem 1rem;
  font-weight: 600;
  font-size: .875rem;
  color: var(--ink-muted);
  background: var(--surface-alt);
  list-style: none;
  user-select: none;
}
.optional-section summary:hover { color: var(--ink); }
.optional-section > :not(summary) { padding: 1rem; }

/* ── PTC block (the artefact) ────────────────────────────── */
.ptc-block {
  background: var(--surface-code);
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.65;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  white-space: pre-wrap;
  word-break: break-all;
  margin: 1.5rem 0;
  border: 1px solid rgba(255,255,255,.06);
  box-shadow: var(--shadow);
}

.ptc-block-label {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent-border);
  margin-bottom: .5rem;
  font-family: var(--font-mono);
}

/* ── Validation result: semaphore ────────────────────────── */
.semaphore {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
  border: 2px solid;
  margin: 1rem 0;
}

.semaphore.valid   { background: var(--green-bg);  border-color: var(--green-border);  }
.semaphore.warning { background: var(--yellow-bg); border-color: var(--yellow-border); }
.semaphore.invalid { background: var(--red-bg);    border-color: var(--red-border);    }

.semaphore-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
}
.valid   .semaphore-dot { background: var(--green); }
.warning .semaphore-dot { background: var(--yellow); }
.invalid .semaphore-dot { background: var(--red); }

.semaphore-label {
  font-weight: 700;
  font-size: 1rem;
  flex: 1;
}
.valid   .semaphore-label { color: var(--green); }
.warning .semaphore-label { color: var(--yellow); }
.invalid .semaphore-label { color: var(--red); }

.semaphore-sub {
  font-size: .85rem;
  color: var(--ink-muted);
}

/* check rows */
.check-rows { margin: .75rem 0; display: flex; flex-direction: column; gap: .4rem; }

.check-row {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  font-size: .875rem;
  padding: .5rem .75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.check-icon { font-size: 1rem; flex-shrink: 0; line-height: 1.4; }
.check-label { font-weight: 600; color: var(--ink); }
.check-detail { color: var(--ink-muted); font-size: .8rem; margin-top: .15rem; }
.check-hash {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--ink-faint);
  word-break: break-all;
  margin-top: .2rem;
}

/* micro pedagogy */
.micro-pedagogy {
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}

.micro-pedagogy-title {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--accent-dark);
  margin-bottom: .6rem;
}

.micro-pedagogy-rows { display: flex; flex-direction: column; gap: .35rem; }

.micro-row {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  font-size: .875rem;
}
.micro-row-key {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--accent);
  font-weight: 500;
  white-space: nowrap;
  min-width: 220px;
}
.micro-row-val { color: var(--ink-muted); }

/* ── Preflight ───────────────────────────────────────────── */
.preflight-rows { display: flex; flex-direction: column; gap: .3rem; margin-top: .75rem; }

.preflight-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .875rem;
  color: var(--ink-muted);
}

/* ── About page ──────────────────────────────────────────── */
.about-lead {
  font-size: 1.15rem;
  font-family: var(--font-head);
  font-style: italic;
  color: var(--ink);
  line-height: 1.6;
  border-left: 3px solid var(--accent);
  padding-left: 1.25rem;
  margin: 1.5rem 0 2rem;
}

.ecosystem-links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1rem 0;
}

.ecosystem-tag {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .3rem .75rem;
  background: var(--accent-light);
  color: var(--accent-dark);
  border: 1px solid var(--accent-border);
  border-radius: 2rem;
  font-size: .8rem;
  font-weight: 600;
  text-decoration: none;
}
.ecosystem-tag:hover { background: var(--accent); color: #fff; text-decoration: none; }

.ptc-own-section {
  margin: 3rem 0 1rem;
  padding-top: 2rem;
  border-top: 2px solid var(--border);
}

.ptc-own-intro {
  font-size: .9rem;
  color: var(--ink-muted);
  font-style: italic;
  margin-bottom: 1rem;
}

/* ── FAQ ─────────────────────────────────────────────────── */
.faq-item {
  margin: 0 0 .5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: .95rem;
  color: var(--ink);
  list-style: none;
  background: var(--surface);
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-item summary:hover { background: var(--surface-alt); }
.faq-item summary::after { content: '+'; color: var(--accent); font-size: 1.2rem; font-weight: 300; }
.faq-item[open] summary::after { content: '−'; }

.faq-answer {
  padding: 1rem 1.25rem 1.25rem;
  border-top: 1px solid var(--border);
  background: var(--surface-alt);
}
.faq-answer p { font-size: .9rem; }
.faq-answer p:last-child { margin-bottom: 0; }

/* ── Home: philosophy strip ──────────────────────────────── */
.philosophy-strip {
  background: var(--surface-alt);
  border: 1px solid var(--accent-border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}
.philosophy-strip p {
  margin: 0;
  font-size: 1rem;
  color: var(--ink);
  line-height: 1.65;
}

/* ── Idle / processing ───────────────────────────────────── */
.idle-message {
  padding: 2.5rem 0;
  text-align: center;
  color: var(--ink-faint);
  font-style: italic;
  font-size: .95rem;
}

.processing-message {
  padding: 2rem 0;
  text-align: center;
  color: var(--ink-muted);
  font-size: .95rem;
}

/* ── Footer ──────────────────────────────────────────────── */
footer {
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  margin-top: 5rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  align-items: center;
  text-align: center;
}

.footer-ecosystem {
  font-size: .875rem;
  color: var(--ink-muted);
}
.footer-ecosystem a { color: var(--accent); font-weight: 600; }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .35rem .75rem;
  font-size: .775rem;
  color: var(--ink-faint);
}
.footer-meta a { color: var(--ink-faint); }
.footer-meta a:hover { color: var(--accent); }

.footer-privacy {
  font-size: .775rem;
  color: var(--ink-faint);
}

/* ── Misc ────────────────────────────────────────────────── */
.subtitle {
  font-size: 1.1rem;
  color: var(--ink-muted);
  margin-bottom: 1.25rem;
  line-height: 1.55;
}

.intro-text {
  font-size: 1rem;
  color: var(--ink-muted);
  margin: 1.5rem 0;
  line-height: 1.7;
}

.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

.boxed-note {
  padding: 1rem 1.25rem;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  margin: 1.5rem 0;
}
.boxed-note p { color: #1e40af; font-size: .875rem; margin: 0; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 640px) {
  body > header nav {
    flex-wrap: wrap;
    height: auto;
    padding: .75rem 1rem .5rem;
    gap: .35rem;
  }
  .nav-links {
    order: 2;
    width: 100%;
    gap: .1rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: .35rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: .25rem;
  }
  .nav-links a { padding: .25rem .4rem; font-size: .72rem; white-space: nowrap; }
  .lang-selector { order: 1; margin-left: auto; }
  main { padding: 1.5rem 1rem 3rem; }
  .three-columns { grid-template-columns: 1fr; }
  .cta-buttons { flex-direction: column; }
  .micro-row { flex-direction: column; gap: .1rem; }
  .micro-row-key { min-width: unset; }
}

/* ── Landing hero v1.1 ───────────────────────────────────── */
.landing-main { max-width: 960px; }

.hero-panel {
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid var(--border);
  border-radius: 18px;
  background:
    radial-gradient(circle at top right, rgba(139,107,191,.14), transparent 34%),
    linear-gradient(180deg, #fff, var(--surface-alt));
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: .8rem;
}

.hero-panel h1 {
  max-width: 760px;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -.025em;
  margin-bottom: .75rem;
}

.hero-subtitle {
  max-width: 680px;
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
}

.hero-actions { margin-bottom: 1rem; }

.trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-top: 1rem;
}
.trust-badges span {
  font-size: .75rem;
  font-weight: 600;
  padding: .25rem .65rem;
  border-radius: 999px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--ink-muted);
}

/* ── Mode tabs (generate page) ───────────────────────────── */
.mode-tab {
  padding: .55rem 1.1rem;
  border: none;
  border-bottom: 3px solid transparent;
  background: transparent;
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 600;
  color: var(--ink-faint);
  cursor: pointer;
  margin-bottom: -2px;
  border-radius: 4px 4px 0 0;
  transition: color .15s, border-color .15s;
}
.mode-tab:hover:not(:disabled) { color: var(--ink-muted); }
.mode-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--surface);
}
.mode-tab-disabled {
  opacity: .45;
  cursor: not-allowed;
  font-style: italic;
}

.mode-panel {
  padding: 1rem 0 .5rem;
}
.mode-panel-desc {
  font-size: .88rem;
  color: var(--ink-muted);
  margin-bottom: 1rem;
  padding: .6rem .8rem;
  background: var(--surface-alt);
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
}

/* ── Shared drag-and-drop zone ───────────────────────────── */
.drop-zone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .28rem;
  width: 100%;
  max-width: 620px;
  min-height: 145px;
  padding: 1.35rem;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface-alt);
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.drop-zone:hover,
.drop-zone:focus-visible,
.drop-zone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-light);
  outline: none;
  box-shadow: 0 0 0 3px rgba(139,107,191,.10);
}
.drop-zone.is-disabled {
  cursor: not-allowed;
  opacity: .58;
  background: var(--surface-alt);
  border-color: var(--border);
  box-shadow: none;
}
.drop-zone input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}
.drop-zone-icon { font-size: 1.45rem; color: var(--accent); line-height: 1; }
.drop-zone-title { font-weight: 600; color: var(--ink); }
.drop-zone-action { font-size: .86rem; color: var(--accent-dark); text-decoration: underline; text-underline-offset: 2px; }
.drop-zone-file { display: none; margin-top: .35rem; font-family: var(--font-mono); font-size: .78rem; color: var(--green); overflow-wrap: anywhere; }
.drop-zone.has-file .drop-zone-file { display: block; }
.drop-zone.has-file .drop-zone-action { display: none; }

/* ── DEV-UI01-U01: selector siempre disponible ───────────── */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.file-picker,
.file-picker__control,
.file-picker__surface,
.selected-file,
.generation-control,
.generation-action {
  box-sizing: border-box;
  min-inline-size: 0;
  max-inline-size: 100%;
}

.file-picker { margin: 1.25rem 0 .75rem; }
.file-picker__surface { max-width: 620px; }
.file-picker__surface:focus-within {
  border-color: var(--accent);
  background: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(139,107,191,.12);
}
.file-picker__label {
  color: var(--ink);
  font-size: .95rem;
  font-weight: 700;
}
.file-picker__drop-hint {
  color: var(--ink-muted);
  font-size: .84rem;
}
.file-picker__surface input[type="file"] {
  position: static;
  display: block;
  width: 100%;
  max-width: 480px;
  height: auto;
  min-height: 44px;
  margin-top: .55rem;
  padding: .48rem .58rem;
  overflow: visible;
  opacity: 1;
  pointer-events: auto;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: .9rem var(--font-body);
  cursor: pointer;
}
.file-picker__surface input[type="file"]:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 2px;
}

.selected-file {
  max-width: 620px;
  margin-top: .9rem;
  padding: 1rem;
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-lg);
  background: var(--accent-light);
}
.selected-file[hidden] { display: none; }
.selected-file h3 { margin: 0 0 .75rem; font-size: 1rem; }
.selected-file__metadata {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .7rem 1rem;
  margin: 0 0 1rem;
}
.selected-file__metadata > div { min-inline-size: 0; }
.selected-file__metadata dt {
  color: var(--ink-muted);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .035em;
  text-transform: uppercase;
}
.selected-file__metadata dd {
  margin: .15rem 0 0;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .82rem;
  overflow-wrap: anywhere;
}
.selected-file__remove { min-height: 44px; }
.selected-file__remove:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 3px;
}

.generation-action {
  max-width: 620px;
  margin-top: 1rem;
}
.generation-control > p,
.generation-action > p {
  max-width: 620px;
  margin: .55rem 0 0;
  font-size: .82rem;
  line-height: 1.5;
}
#generate-ptc-button,
#generate-reference-btn {
  min-height: 44px;
  background: var(--accent-dark);
}
#generate-ptc-button:hover,
#generate-reference-btn:hover { background: #563d85; }
#generate-ptc-button:focus-visible,
#generate-reference-btn:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 3px;
}
#generate-ptc-button:disabled,
#generate-reference-btn:disabled {
  cursor: not-allowed;
  opacity: .56;
  box-shadow: none;
  transform: none;
}
#generate-ptc-button:disabled:hover,
#generate-reference-btn:disabled:hover,
#generate-ptc-button[aria-disabled="true"],
#generate-ptc-button[aria-disabled="true"]:hover,
#generate-reference-btn[aria-disabled="true"],
#generate-reference-btn[aria-disabled="true"]:hover {
  background: var(--accent-dark);
  color: #fff;
}
#generate-ptc-button[aria-disabled="true"],
#generate-reference-btn[aria-disabled="true"] {
  cursor: progress;
  opacity: .72;
  box-shadow: none;
  transform: none;
}
#generate-ptc-button[aria-disabled="true"]:active,
#generate-reference-btn[aria-disabled="true"]:active { transform: none; }
#generation-ready { color: var(--ink-muted); }
#generation-status { color: var(--ink-muted); }
#generation-error { color: var(--red); }
#reference-generation-status { color: var(--ink-muted); }
#reference-generation-error { color: var(--red); }

@media (max-width: 640px) {
  .file-picker__surface {
    align-items: stretch;
    min-height: 0;
    padding: 1rem;
    text-align: left;
  }
  .file-picker__surface .drop-zone-icon,
  .file-picker__drop-hint { display: none; }
  .file-picker__surface input[type="file"],
  .selected-file__remove,
  #generate-ptc-button,
  #generate-reference-btn {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    min-height: 44px;
    box-sizing: border-box;
  }
  .file-picker__surface input[type="file"] { overflow: hidden; }
  .selected-file__remove,
  #generate-ptc-button,
  #generate-reference-btn {
    justify-content: center;
    white-space: normal;
    overflow-wrap: anywhere;
  }
  .selected-file__metadata { grid-template-columns: 1fr; }
  .mode-tabs { flex-wrap: wrap; }
  .mode-tab {
    flex: 1 1 30%;
    min-width: 0;
    white-space: normal;
    overflow-wrap: anywhere;
  }
}
.footer-links { line-height: 1.9; }


/* ── PTC declaration guidance and inline validation ─────── */
.level-anchor {
  max-width: 720px;
  margin-top: .55rem;
  font-size: .82rem;
  line-height: 1.55;
  color: var(--ink-muted);
}
.level-help {
  max-width: 720px;
  margin-top: .65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-alt);
}
.level-help summary {
  cursor: pointer;
  padding: .55rem .75rem;
  color: var(--accent-dark);
  font-size: .84rem;
  font-weight: 600;
}
.level-help-grid {
  display: grid;
  gap: .75rem;
  padding: .2rem .8rem .9rem;
}
.level-help-item {
  padding-top: .65rem;
  border-top: 1px solid var(--border);
}
.level-help-item strong { display: block; font-size: .85rem; margin-bottom: .15rem; }
.level-help-item p { margin: 0; font-size: .82rem; line-height: 1.55; }
.level-dynamic-hint {
  min-height: 1.25rem;
  margin-top: .55rem;
  color: var(--accent-dark);
  font-size: .82rem;
  line-height: 1.5;
}
.purpose-example { max-width: 720px; }
.technical-field-note { font-family: var(--font-mono); font-size: .74rem; }
.optional-functional-help { max-width: 680px; margin-bottom: .75rem; }
.field-error {
  max-width: 560px;
  margin-top: .35rem;
  color: var(--red);
  font-size: .8rem;
  line-height: 1.45;
}
.form-group input[aria-invalid="true"],
.form-group textarea[aria-invalid="true"] {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(220,38,38,.08);
}

.form-group.is-other-level textarea { border-color: var(--accent); background: var(--accent-light); }

/* ═══ BETA-02 — pantalla minimalista de Crear ═══ */
.drop-zone-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  width: 100%;
  max-width: none;
  padding: 3rem 1.5rem;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface-alt);
  cursor: pointer;
  text-align: center;
  transition: border-color .15s, background .15s;
  margin: 1.5rem 0 .75rem;
}
.drop-zone-main:hover, .drop-zone-main:focus-within { border-color: var(--accent); background: var(--accent-light); }
.drop-zone-main-icon { font-size: 2rem; opacity: .6; }
.drop-zone-main-text { font-size: 1rem; color: var(--ink-muted); }
.drop-zone-main input[type="file"] { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; }
.drop-zone-main-btn { margin-top: .4rem; }
.privacy-hint { font-size: .82rem; color: var(--ink-muted); text-align: center; margin-bottom: 1.25rem; }
.stage0-secondary { text-align: center; margin-bottom: 1.5rem; }
.stage0-info-links { display: flex; flex-wrap: wrap; gap: 1.25rem; justify-content: center; font-size: .82rem; }
.stage0-info-links details summary { cursor: pointer; color: var(--ink-muted); }
.stage0-info-links details p { max-width: 480px; margin-top: .4rem; font-size: .82rem; }

.link-button {
  background: none; border: none; padding: 0; margin: 0;
  color: var(--accent); text-decoration: underline; cursor: pointer;
  font-size: inherit; font-family: inherit;
}
.link-button:hover { color: var(--accent-dark, var(--accent)); }
.back-link { display: inline-block; margin-bottom: 1rem; font-size: .85rem; }

.mode-indicator {
  padding: .75rem 1rem; margin: .75rem 0;
  background: var(--green-bg); border: 1px solid var(--green-border);
  border-radius: var(--radius);
}
.mode-indicator strong { color: var(--green); display: block; margin-bottom: .25rem; }
.mode-indicator p { margin: 0; font-size: .85rem; color: var(--ink-muted); }

.info-icon { position: relative; cursor: help; color: var(--ink-muted); font-size: .85rem; margin-left: .3rem; }
.info-icon .info-tooltip {
  display: none; position: absolute; bottom: 140%; left: 0; z-index: 5;
  width: 240px; padding: .5rem .6rem; background: var(--ink); color: #fff;
  border-radius: 6px; font-size: .78rem; line-height: 1.4;
}
.info-icon:hover .info-tooltip, .info-icon:focus .info-tooltip { display: block; }

.summary-box { padding: .85rem 1rem; background: var(--surface-alt); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 1rem; }
.summary-row { display: flex; justify-content: space-between; gap: 1rem; padding: .3rem 0; font-size: .88rem; border-bottom: 1px solid var(--border); }
.summary-row:last-child { border-bottom: none; }
.summary-key { color: var(--ink-muted); }
.summary-val { font-weight: 600; text-align: right; word-break: break-word; }

.eu-legal-note { font-size: .78rem; margin-top: .5rem; }

@media (max-width: 640px) {
  .drop-zone-main { padding: 2rem 1rem; }
  .stage0-info-links { flex-direction: column; align-items: center; gap: .5rem; }
  .summary-row { flex-direction: column; gap: .1rem; }
  .summary-val { text-align: left; }
}

/* ═══ WEB3-U2 — componente de información accesible ═══ */
.field-label-row { display: flex; align-items: center; gap: .45rem; margin-bottom: .3rem; }
.field-label-row label { margin-bottom: 0; }
.info-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  border: 1.5px solid #2563eb;
  background: #fff;
  color: #2563eb;
  font-size: .82rem;
  font-weight: 700;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  flex-shrink: 0;
  transition: background .12s, color .12s;
}
.info-btn:hover, .info-btn:focus-visible {
  background: #2563eb;
  color: #fff;
  outline: none;
  box-shadow: 0 0 0 3px rgba(37,99,235,.18);
}
.info-btn[aria-expanded="true"] { background: #2563eb; color: #fff; }
.info-panel {
  position: relative;
  margin: .4rem 0 .9rem;
  padding: .8rem 2.1rem .8rem .9rem;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  font-size: .85rem;
  line-height: 1.55;
  color: var(--ink);
}
.info-panel p { margin: 0 0 .55rem; }
.info-panel p:last-of-type { margin-bottom: 0; }
.info-panel-close {
  position: absolute;
  top: .5rem;
  right: .5rem;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  cursor: pointer;
  color: #2563eb;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.info-panel-close:hover, .info-panel-close:focus-visible {
  background: rgba(37,99,235,.12);
  outline: none;
}
.info-panel-levels { display: grid; gap: .6rem; margin-top: .4rem; }
.info-panel-levels strong { display: block; margin-bottom: .15rem; }
.info-panel-levels p { margin: 0; }

@media (max-width: 640px) {
  .info-panel { padding-right: 2.6rem; }
}

/* ═══ WEB3-generate-v3 — agrupación visual de la tríada (§6.1) ═══
   Nivel / colaboración / revisión humana comparten un borde y un fondo
   suaves para leerse como una unidad, sin convertirse en tres tarjetas
   pesadas ni modificar los campos ni los valores normativos internos. */
.triada-group {
  padding: 1rem 1.1rem .2rem;
  margin: .5rem 0 1.25rem;
  background: var(--surface-alt);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.triada-group .form-group:last-child { margin-bottom: .8rem; }

/* ═══ WEB3-generate-v3 — selector binario visible del objeto protegido (§5) ═══ */
.mode-selector {
  display: flex;
  gap: .6rem;
  margin: .75rem 0;
}
.mode-selector-btn {
  flex: 1;
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem .9rem;
  border: 2px solid var(--border-strong);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  text-align: left;
  transition: border-color .12s, background .12s;
}
.mode-selector-btn .mode-selector-check {
  width: 18px; height: 18px; flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  font-size: .7rem; color: transparent;
}
.mode-selector-btn.is-active {
  border-color: var(--accent);
  background: var(--accent-light);
}
.mode-selector-btn.is-active .mode-selector-check {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}
.mode-selector-btn:hover:not(:disabled):not([aria-disabled="true"]) { border-color: var(--accent); }
.mode-selector-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.mode-selector-text { display: flex; flex-direction: column; gap: .1rem; }
.mode-selector-label { font-weight: 600; font-size: .92rem; }
.mode-selector-badge {
  font-size: .72rem;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .02em;
}
.mode-selector-btn:disabled,
.mode-selector-btn[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: .55;
  background: var(--surface-alt);
}
.mode-selector-btn:disabled .mode-selector-check,
.mode-selector-btn[aria-disabled="true"] .mode-selector-check { border-color: var(--border); }

@media (max-width: 560px) {
  .mode-selector { flex-direction: column; }
}


/* ── WEB3 Generate v4: clarity of mode, open fields and optional publication ── */
.mode-indicator-heading { display:flex; align-items:center; gap:.45rem; margin-bottom:.25rem; }
.mode-indicator-heading strong { margin-bottom:0; }
.mode-indicator-heading .info-btn { flex:0 0 auto; }
.field-guidance { margin:.38rem 0 .15rem; color:var(--ink-muted); font-size:.84rem; line-height:1.45; }
.optional-flow-card { max-width:760px; margin:1.35rem auto 0; padding:1.2rem 1.25rem; border:1px solid var(--border); border-radius:var(--radius); background:var(--surface); }
.optional-flow-card__header { margin-bottom:1rem; }
.optional-flow-card__eyebrow { margin:0 0 .2rem; color:var(--accent); font-size:.76rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase; }
.optional-flow-card h2 { margin:0 0 .35rem; font-size:1.15rem; }
.optional-flow-card__header > p:last-child { margin:0; color:var(--ink-muted); line-height:1.5; }
#disclosure-gate1-group,#disclosure-toggle-group { margin:.75rem 0 0; padding:.85rem .9rem; border:1px solid var(--border); border-radius:calc(var(--radius) - 2px); background:var(--surface-soft,#faf9fd); }
#disclosure-gate2-wrapper { margin-top:.55rem; }
#exact-disclosure-fields { margin-top:.9rem; padding-top:.9rem; border-top:1px solid var(--border); }
.textual-mode-note { padding:.9rem 1rem; border-left:3px solid var(--accent); border-radius:0 calc(var(--radius) - 2px) calc(var(--radius) - 2px) 0; background:var(--surface-soft,#faf9fd); }
.textual-mode-note strong { display:block; margin-bottom:.25rem; }
.textual-mode-note p { margin:0; color:var(--ink-muted); line-height:1.5; }
@media (max-width:560px) { .optional-flow-card { padding:1rem; } .mode-indicator-heading { align-items:flex-start; } }


/* BETA-02 · UI polish from first hands-on test */
.drop-zone{gap:.34rem}
.drop-zone-icon{display:block;margin-bottom:.18rem;font-size:1.55rem;line-height:1}
.drop-zone-title{display:block;line-height:1.35}
.drop-zone-action{display:block;margin-top:.02rem;line-height:1.35}
.info-btn{width:25px;height:25px;min-width:25px;border:none;background:#2563eb;color:#fff;font-family:Arial,sans-serif;font-size:.82rem;font-weight:800;font-style:normal;line-height:1;border-radius:50%;box-shadow:none}
.info-btn:hover,.info-btn:focus-visible,.info-btn[aria-expanded="true"]{background:#174ea6;color:#fff;box-shadow:0 0 0 3px rgba(37,99,235,.17)}
.level-other-wrapper{margin:.55rem 0 .15rem;padding:.75rem .8rem;background:var(--accent-light);border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0}.level-other-wrapper label{font-size:.84rem;font-weight:650}.level-other-wrapper textarea{min-height:74px;margin-top:.35rem}.collab-preset{margin-bottom:.45rem}.collab-free-hint{margin:.2rem 0 .35rem;color:var(--ink-muted);font-size:.78rem}

/* BETA-03 · editable AI-system preset */
.ai-system-free-hint{margin:.15rem 0 .35rem;color:var(--ink-muted);font-size:.78rem}.ai-system-preset{margin-bottom:.45rem}.level-other-wrapper{background:#f5f1fb;border-left-color:var(--accent-dark)}