/* =========================================================
   Kit de Herramientas — sistema de diseño
   Paleta: papel claro + tinta + acento teal + amber
   Tipografía: Space Grotesk (display) / Inter (texto) / IBM Plex Mono (visor)
   ========================================================= */

:root {
  --color-bg: #F5F6F3;
  --color-surface: #FFFFFF;
  --color-ink: #14181F;
  --color-ink-soft: #5B6472;
  --color-line: #DEE1DC;

  --color-accent: #0F8B6C;
  --color-accent-dark: #0B6B54;
  --color-accent-soft: #E2F2EC;

  --color-highlight: #E8A33D;
  --color-highlight-soft: #FBEEDA;

  --color-readout-bg: #10231E;
  --color-readout-fg: #6BE3B5;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-card: 0 1px 2px rgba(20,24,31,0.04), 0 8px 24px rgba(20,24,31,0.06);

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;

  --max-width: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 .5em 0;
  letter-spacing: -0.01em;
}

p { color: var(--color-ink-soft); }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--color-ink);
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--color-ink);
  color: var(--color-readout-fg);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.02em;
}

.main-nav {
  display: flex;
  gap: 4px;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-ink-soft);
  font-size: 0.92rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background .15s ease, color .15s ease;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 1rem;
  cursor: pointer;
}

@media (max-width: 720px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    padding: 8px;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
}

/* ---------- Hero / page intro ---------- */
.page-hero {
  padding: 56px 0 28px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.page-hero h1 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); max-width: 720px; }
.page-hero p { font-size: 1.05rem; max-width: 620px; }

.jumplinks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.jumplink {
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  padding: 7px 14px;
  border-radius: 999px;
  white-space: nowrap;
  transition: background .15s ease;
}
.jumplink:hover { background: var(--color-highlight-soft); color: #8a5a12; }

/* ---------- Toolbox grid (home) ---------- */
.toolbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
  padding: 8px 0 8px;
}

.category-section {
  padding-bottom: 44px;
  scroll-margin-top: 84px;
}

.category-title {
  font-size: 1.3rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 22px;
  text-decoration: none;
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform .15s ease, border-color .15s ease;
}

.tool-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
}

.tool-card .tool-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 600;
}

.tool-card h3 { font-size: 1.15rem; margin-bottom: 2px; }
.tool-card p { font-size: 0.92rem; margin: 0; }

.tool-card .mini-readout {
  margin-top: auto;
  background: var(--color-readout-bg);
  color: var(--color-readout-fg);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.coming-soon {
  opacity: 0.55;
  cursor: default;
}
.coming-soon:hover { transform: none; border-color: var(--color-line); }

/* ---------- Tool page layout ---------- */
.tool-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  padding-bottom: 64px;
  align-items: start;
}

@media (max-width: 860px) {
  .tool-layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-ink);
}

.field .hint {
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  margin-top: 4px;
}

input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 11px 12px;
  font-size: 1rem;
  font-family: var(--font-body);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-ink);
}

textarea { resize: vertical; min-height: 140px; }

input:focus, select:focus, textarea:focus, button:focus, a:focus {
  outline: 3px solid var(--color-highlight);
  outline-offset: 1px;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 480px) {
  .row { grid-template-columns: 1fr; }
}

button, .btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  padding: 11px 18px;
  border: none;
  cursor: pointer;
  transition: background .15s ease, transform .05s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover { background: var(--color-accent-dark); }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
  background: transparent;
  color: var(--color-ink-soft);
  border: 1px solid var(--color-line);
}
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent-dark); }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }

/* ---------- Readout (signature element) ---------- */
.readout-panel {
  background: var(--color-readout-bg);
  border-radius: var(--radius-lg);
  padding: 26px;
  position: sticky;
  top: 92px;
}

.readout-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(107,227,181,0.6);
  margin-bottom: 10px;
}

.readout-value {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--color-readout-fg);
  word-break: break-word;
  line-height: 1.2;
  text-shadow: 0 0 18px rgba(107,227,181,0.25);
  min-height: 1.2em;
}

.readout-sub {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin-top: 10px;
  line-height: 1.5;
}

.readout-divider {
  height: 1px;
  background: rgba(255,255,255,0.12);
  margin: 16px 0;
}

/* ---------- Meter / strength bar (password tool) ---------- */
.meter {
  height: 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.12);
  overflow: hidden;
  margin-top: 12px;
}
.meter-fill {
  height: 100%;
  width: 0%;
  background: var(--color-highlight);
  transition: width .2s ease, background .2s ease;
}

/* ---------- Explanation / SEO content blocks ---------- */
.explainer {
  padding: 8px 0 64px;
  max-width: 760px;
}
.explainer h2 { font-size: 1.4rem; margin-top: 1.6em; }
.explainer ul { color: var(--color-ink-soft); }

.faq-item { border-top: 1px solid var(--color-line); padding: 18px 0; }
.faq-item:last-child { border-bottom: 1px solid var(--color-line); }
.faq-item h3 { font-size: 1.02rem; margin-bottom: 6px; }
.faq-item p { margin: 0; font-size: 0.95rem; }

/* ---------- Ad slot placeholders ---------- */
.ad-slot {
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-md);
  color: var(--color-ink-soft);
  font-size: 0.8rem;
  text-align: center;
  padding: 18px;
  margin: 32px 0;
  font-family: var(--font-mono);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 36px 0;
  margin-top: 24px;
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--color-accent-dark); }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- Utility ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}