/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #f7f5f1;
  --surface: #ffffff;
  --surface-2: #fbf9f5;
  --border: #e7e2d8;
  --text: #201d18;
  --text-soft: #6b6255;
  --accent: #e2582a;
  --accent-2: #f6a13e;
  --accent-ink: #ffffff;
  --cream: #fff9f0;
  --success: #2f8f5b;
  --error: #c0392b;
  --shadow-sm: 0 1px 2px rgba(30, 20, 10, .06);
  --shadow-md: 0 8px 24px -8px rgba(30, 20, 10, .18);
  --shadow-lg: 0 20px 48px -16px rgba(30, 20, 10, .28);
  --sans: "Manrope", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 26px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14120e;
    --surface: #1d1a14;
    --surface-2: #211d17;
    --border: #343026;
    --text: #f3ede0;
    --text-soft: #b3a996;
    --cream: #1c1911;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
    --shadow-md: 0 8px 24px -8px rgba(0, 0, 0, .5);
    --shadow-lg: 0 20px 48px -16px rgba(0, 0, 0, .6);
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3 { font-family: var(--sans); text-wrap: balance; line-height: 1.1; letter-spacing: -0.01em; font-weight: 800; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--cream); color: var(--text);
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

.container { max-width: 800px; margin-inline: auto; padding-inline: 1.25rem; }

/* =============================================================
   3. Header / footer
   ============================================================= */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
@supports (backdrop-filter: blur(10px)) {
  .site-header { backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%); }
}
.header-inner { display: flex; align-items: center; gap: 1rem; padding-block: .85rem; max-width: 1040px; margin-inline: auto; padding-inline: 1.25rem; }
.logo { display: flex; align-items: center; gap: .5rem; font-weight: 800; font-family: var(--sans); font-size: 1.1rem; flex-shrink: 0; }
.logo-mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-sm);
}

.tool-nav {
  display: flex; gap: .35rem; overflow-x: auto; flex: 1 1 auto;
  scrollbar-width: none; -ms-overflow-style: none;
}
.tool-nav::-webkit-scrollbar { display: none; }
.tool-nav a {
  flex: 0 0 auto;
  padding: .5rem .85rem;
  border-radius: 999px;
  font-size: .85rem; font-weight: 600; color: var(--text-soft);
  transition: background .18s var(--ease-out), color .18s var(--ease-out);
  white-space: nowrap;
}
.tool-nav a:hover { background: var(--surface-2); color: var(--text); }
.tool-nav a[aria-current="page"] { background: var(--text); color: var(--bg); }

.nav-toggle { display: none; flex-shrink: 0; padding: .4rem; border-radius: 8px; }
.nav-toggle svg { display: block; }

.site-footer { border-top: 1px solid var(--border); margin-top: 3.5rem; padding-block: 1.75rem; color: var(--text-soft); font-size: .85rem; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .75rem; }
.footer-inner nav { display: flex; gap: 1rem; }
.footer-inner a:hover { color: var(--accent); }

/* =============================================================
   4. Hero + tool card
   ============================================================= */
.hero { position: relative; padding-block: 3rem 1.5rem; text-align: center; }
.hero-halo {
  position: absolute; inset: -20% -10% auto -10%; height: 420px;
  background:
    radial-gradient(45% 60% at 30% 20%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%),
    radial-gradient(40% 55% at 75% 10%, color-mix(in srgb, var(--accent-2) 20%, transparent), transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: -1;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .78rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent); margin-bottom: .9rem;
}
.hero h1 { font-size: clamp(1.9rem, 4.4vw, 2.7rem); max-width: 22ch; margin-inline: auto; }
.hero-sub { color: var(--text-soft); margin-top: .85rem; max-width: 48ch; margin-inline: auto; font-size: 1.02rem; }

.tool-card {
  margin-top: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-align: left;
  box-shadow: var(--shadow-md);
}

.dropzone {
  display: flex; flex-direction: column; align-items: center; gap: .4rem;
  padding: 2.25rem 1rem;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: center;
  transition: border-color .2s var(--ease-out), background .2s var(--ease-out), transform .2s var(--ease-out);
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, transparent); }
.dropzone.is-dragover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); transform: scale(1.01); }
.dropzone-icon {
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 18%, transparent), color-mix(in srgb, var(--accent-2) 18%, transparent));
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.dropzone-text { font-weight: 700; }
.dropzone-hint { color: var(--text-soft); font-size: .85rem; }

.tool-controls { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.4rem; }
.field { display: flex; flex-direction: column; gap: .4rem; font-size: .85rem; font-weight: 700; flex: 1 1 160px; }
.field select, .field input[type="range"], .field input[type="text"], .field input[type="number"] { font: inherit; }
.field select, .field input[type="text"], .field input[type="number"] {
  padding: .6rem .75rem; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface); color: var(--text);
}
.field input[type="range"] { accent-color: var(--accent); }

.results { display: flex; flex-direction: column; gap: .6rem; margin-top: 1.4rem; }
.result-row {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .8rem 1rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface-2);
  transition: box-shadow .18s var(--ease-out);
}
.result-row:hover { box-shadow: var(--shadow-sm); }
.result-info { display: flex; flex-direction: column; gap: .15rem; min-width: 0; }
.result-name { font-weight: 700; font-size: .9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 32ch; }
.result-meta { font-size: .8rem; color: var(--text-soft); }
.result-meta .save { color: var(--success); font-weight: 700; }
.btn, .btn-download {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink); font-weight: 700;
  padding: .6rem 1.1rem; border-radius: 999px; font-size: .85rem;
  transition: transform .15s var(--ease-out), box-shadow .15s var(--ease-out);
  box-shadow: var(--shadow-sm);
}
.btn:hover, .btn-download:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary {
  background: var(--surface-2); color: var(--text); border: 1px solid var(--border);
  box-shadow: none;
}
.btn-secondary:hover { background: var(--surface); box-shadow: var(--shadow-sm); }
.spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid var(--border); border-top-color: var(--accent);
  display: inline-block; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.tool-reset { margin-top: 1.1rem; text-align: center; }
.tool-reset button { color: var(--accent); font-weight: 700; font-size: .9rem; }

.privacy-badge { margin-top: 1.4rem; font-size: .9rem; color: var(--success); font-weight: 700; }
.limits-note { margin-top: .4rem; font-size: .8rem; color: var(--text-soft); }

/* =============================================================
   5. Ad slots
   ============================================================= */
.ad-slot {
  min-height: 90px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-block: 2.25rem;
  color: var(--text-soft);
  font-size: .8rem;
}
.ad-slot-label { text-transform: uppercase; letter-spacing: .08em; }

/* =============================================================
   6. Content sections
   ============================================================= */
.how-it-works, .seo-text, .faq, .mas-herramientas { padding-block: 1.75rem; }
.how-it-works h2, .seo-text h2, .faq h2, .mas-herramientas h2 { font-size: 1.45rem; margin-bottom: 1.1rem; }

.steps { list-style: none; display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
.steps li { display: flex; flex-direction: column; gap: .5rem; }
.steps .step-icon {
  width: 40px; height: 40px; border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.steps h3 { font-size: 1rem; }
.steps p { color: var(--text-soft); font-size: .92rem; }

.seo-text p { color: var(--text-soft); margin-bottom: 1rem; }
.seo-text strong { color: var(--text); }

.faq-item { border-bottom: 1px solid var(--border); padding-block: 1rem; }
.faq-item summary { font-weight: 700; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--accent); font-weight: 800; flex-shrink: 0; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { color: var(--text-soft); margin-top: .6rem; font-size: .92rem; }

.tool-cards { display: grid; gap: .85rem; grid-template-columns: 1fr; }
.tool-card-link {
  display: flex; align-items: center; gap: .85rem;
  padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface);
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out), border-color .18s var(--ease-out);
}
.tool-card-link:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.tool-card-link .tool-card-icon {
  width: 38px; height: 38px; border-radius: 11px; flex-shrink: 0;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 16%, transparent), color-mix(in srgb, var(--accent-2) 16%, transparent));
  display: flex; align-items: center; justify-content: center; color: var(--accent);
}
.tool-card-link strong { display: block; font-size: .95rem; }
.tool-card-link small { color: var(--text-soft); font-size: .8rem; }

/* =============================================================
   6.5 PDF-specific helpers (herramientas-pdf page)
   ============================================================= */
.pdf-modes { display: flex; gap: .5rem; margin-bottom: 1.4rem; flex-wrap: wrap; }
.pdf-mode-btn {
  padding: .55rem 1rem; border-radius: 999px; border: 1px solid var(--border);
  font-weight: 700; font-size: .85rem; color: var(--text-soft); background: var(--surface-2);
}
.pdf-mode-btn[aria-pressed="true"] { background: var(--text); color: var(--bg); border-color: var(--text); }
.pdf-thumbs { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1rem; }
.pdf-thumb {
  position: relative; border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
  width: 92px; background: var(--surface-2); cursor: grab;
}
.pdf-thumb img { width: 100%; display: block; }
.pdf-thumb .pdf-thumb-num {
  position: absolute; top: 4px; left: 4px; background: rgba(0,0,0,.65); color: #fff;
  font-size: .7rem; padding: .1rem .4rem; border-radius: 6px;
}
.pdf-thumb .pdf-thumb-remove {
  position: absolute; top: 4px; right: 4px; background: rgba(0,0,0,.65); color: #fff;
  width: 20px; height: 20px; border-radius: 50%; font-size: .8rem; line-height: 1;
  display: flex; align-items: center; justify-content: center;
}
.pdf-thumb.is-dragging { opacity: .4; }
.range-input { width: 100%; padding: .6rem .75rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; }

/* =============================================================
   7. Responsive
   ============================================================= */
@media (min-width: 540px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .tool-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 719px) {
  .tool-nav { display: none; }
  .tool-nav.is-open {
    display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--surface); border-bottom: 1px solid var(--border); padding: .5rem 1.25rem 1rem;
    box-shadow: var(--shadow-md);
  }
  .tool-nav.is-open a { width: 100%; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
}