/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --accent:       #0EA98B;   /* menta oscura — primario (4.9:1 sobre blanco) */
  --accent-dark:  #0B8A72;
  --accent-soft:  #E3F7F1;
  --accent-2:     #FF6B4A;   /* coral — secundario */
  --accent-2-ink: #D14A2B;
  --accent-2-soft:#FFE9E1;

  --on-accent: #FFFFFF;

  --bg:        #FBFDFC;
  --bg-2:      #F0F7F4;
  --card:      #FFFFFF;
  --text:      #142622;      /* alto contraste sobre --bg */
  --text-soft: #4B5F5A;
  --border:    #DAEAE4;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --serif: "Fredoka", ui-rounded, system-ui, sans-serif;
  --sans:  "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent:       #4CD9B5;
    --accent-dark:  #7EE8CB;
    --accent-soft:  #12332C;
    --accent-2:     #FF8B6E;
    --accent-2-ink: #FFAA92;
    --accent-2-soft:#3A2018;

    --on-accent: #08211C;

    --bg:        #0C1613;
    --bg-2:      #101E1A;
    --card:      #142622;
    --text:      #EAF5F1;
    --text-soft: #A9C2BB;
    --border:    #1F332D;
  }
}

/* =============================================================
   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 {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
[hidden] { display: none !important; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.1; font-family: var(--serif); font-weight: 600; }
::selection { background: var(--accent); color: var(--on-accent); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =============================================================
   3. Utilities
   ============================================================= */
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--card); color: var(--text);
  z-index: 9999; border-radius: 8px; font-weight: 600;
  box-shadow: 0 4px 16px rgba(0,0,0,.15);
}
.skip-link:focus { top: 1rem; }

.wrap { width: 100%; max-width: 1100px; margin-inline: auto; padding-inline: 1.25rem; }
.wrap--narrow { max-width: 760px; }

/* =============================================================
   4. Typography
   ============================================================= */
.section-title {
  font-size: clamp(1.9rem, 5vw, 2.7rem);
  letter-spacing: -0.01em;
  text-align: center;
  margin-inline: auto;
  max-width: 18ch;
}
.section-sub {
  text-align: center;
  color: var(--text-soft);
  max-width: 46ch;
  margin: .7rem auto 0;
  font-size: 1.05rem;
}
.section-title-sm {
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin-bottom: 1.4rem;
}

/* =============================================================
   5. Components
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem;
  padding: .9rem 1.6rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  transition: transform .2s var(--ease-out), background .2s var(--ease-out), box-shadow .2s var(--ease-out);
}
.btn-primary {
  background: var(--accent); color: var(--on-accent);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent);
}
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn-ghost {
  background: var(--bg-2); color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* =============================================================
   6. Header / footer
   ============================================================= */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header-in {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding-block: .8rem;
}
.brand { display: flex; align-items: center; gap: .5rem; color: var(--accent); }
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 1.25rem; color: var(--text); }
.site-nav { display: flex; gap: 1.4rem; font-weight: 600; font-size: .92rem; }
.site-nav a { color: var(--text-soft); transition: color .2s var(--ease-out); }
.site-nav a:hover { color: var(--accent); }
@media (max-width: 719px) { .site-nav { display: none; } }

.site-footer { border-top: 1px solid var(--border); margin-top: 3rem; padding-block: 2rem; }
.site-footer-in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .8rem; }
.foot-brand { color: var(--text-soft); font-size: .92rem; }
.foot-nav { display: flex; gap: 1.2rem; font-size: .92rem; font-weight: 600; }
.foot-nav a:hover { color: var(--accent); }
.foot-note { width: 100%; color: var(--text-soft); font-size: .82rem; margin-top: .4rem; }

/* =============================================================
   7. Sections
   ============================================================= */
.section { padding-block: 2.6rem; }
.section--tool { padding-top: 2.2rem; }

/* =============================================================
   8. Tool card
   ============================================================= */
.tool-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  margin-top: 1.8rem;
  box-shadow: 0 20px 50px -30px rgba(0,0,0,.25);
}
.tool-card-body { display: flex; flex-direction: column; gap: 1.2rem; }

.dropzone {
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
  text-align: center;
  padding: 2.4rem 1.5rem;
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-2);
  color: var(--text-soft);
  cursor: pointer;
  transition: border-color .2s var(--ease-out), background .2s var(--ease-out);
}
.dropzone svg { color: var(--accent); }
.dropzone:hover, .dropzone:focus-visible, .dropzone.is-drag {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone-title { font-weight: 700; font-size: 1.1rem; color: var(--text); font-family: var(--serif); }
.dropzone-sub { font-size: .88rem; }

.level-picker {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .6rem;
}
@media (max-width: 539px) { .level-picker { grid-template-columns: 1fr; } }
.level-btn {
  display: flex; flex-direction: column; gap: .15rem;
  padding: .8rem .9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-2);
  text-align: left;
  transition: border-color .2s var(--ease-out), background .2s var(--ease-out);
}
.level-btn:hover { border-color: var(--accent); }
.level-btn.is-on { border-color: var(--accent); background: var(--accent-soft); }
.level-name { font-weight: 700; font-size: .95rem; }
.level-desc { font-size: .8rem; color: var(--text-soft); }
.level-btn.is-on .level-name { color: var(--accent-dark); }

.engine-status { display: flex; flex-direction: column; gap: .5rem; }
.engine-bar { height: 6px; border-radius: 999px; background: var(--bg-2); overflow: hidden; }
.engine-bar-fill { height: 100%; width: 0%; background: var(--accent); transition: width .25s var(--ease-out); }
.engine-status p { font-size: .85rem; color: var(--text-soft); text-align: center; }

.file-list { list-style: none; display: flex; flex-direction: column; gap: .7rem; }
.file-row {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: .8rem;
  padding: .8rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-2);
}
.file-thumb {
  width: 44px; height: 44px; border-radius: 8px; object-fit: cover;
  background: var(--border);
}
.file-info { min-width: 0; }
.file-name { font-weight: 600; font-size: .9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-meta { font-size: .8rem; color: var(--text-soft); display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; }
.file-meta .saved { color: var(--accent-dark); font-weight: 700; }
.file-progress { height: 4px; border-radius: 999px; background: var(--border); overflow: hidden; margin-top: .35rem; }
.file-progress-fill { height: 100%; width: 0%; background: var(--accent); transition: width .2s var(--ease-out); }
.file-actions { display: flex; align-items: center; gap: .5rem; }
.file-download {
  padding: .5rem .9rem; border-radius: var(--radius-sm);
  background: var(--accent); color: var(--on-accent);
  font-weight: 700; font-size: .85rem; white-space: nowrap;
}
.file-download:hover { background: var(--accent-dark); }
.file-error { color: var(--accent-2-ink); font-size: .8rem; }
.file-remove {
  width: 28px; height: 28px; border-radius: 999px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-soft);
}
.file-remove:hover { background: var(--border); color: var(--text); }

.batch-actions { display: flex; gap: .8rem; flex-wrap: wrap; justify-content: center; }

.privacy-badge {
  text-align: center;
  color: var(--text-soft);
  font-size: .9rem;
  margin-top: 1rem;
}

/* =============================================================
   9. Ad slots
   ============================================================= */
.ad-slot {
  min-height: 90px;
  margin-block: 1.8rem;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-soft);
}
.ad-slot-label { font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }

/* =============================================================
   10. Steps / prose / FAQ / more-tools
   ============================================================= */
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  margin-bottom: 2.6rem;
}
@media (max-width: 719px) { .steps { grid-template-columns: 1fr; } }
.step { display: flex; flex-direction: column; gap: .5rem; }
.step svg { color: var(--accent); }
.step h3 { font-size: 1.05rem; }
.step p { color: var(--text-soft); font-size: .92rem; }

.prose { display: flex; flex-direction: column; gap: 1rem; }
.prose h2 { font-size: 1.4rem; margin-top: .6rem; }
.prose h3 { font-size: 1.1rem; margin-top: .4rem; }
.prose p { color: var(--text-soft); }

.faq-list { display: flex; flex-direction: column; gap: .6rem; }
.faq-item {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .9rem 1.1rem;
  background: var(--card);
}
.faq-item summary {
  cursor: pointer; font-weight: 700; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-size: 1.3rem; color: var(--accent); flex-shrink: 0;
  transition: transform .2s var(--ease-out);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { color: var(--text-soft); margin-top: .6rem; font-size: .93rem; }

.tools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; }
.tool-link-card {
  display: flex; flex-direction: column; gap: .3rem;
  padding: 1.1rem 1.2rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
  transition: border-color .2s var(--ease-out), transform .2s var(--ease-out);
}
.tool-link-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.tool-link-name { font-weight: 700; color: var(--accent-dark); }
.tool-link-desc { font-size: .85rem; color: var(--text-soft); }

/* =============================================================
   11. Effects
   ============================================================= */
.tool-card[data-state="idle"] .file-list,
.tool-card[data-state="idle"] .batch-actions { display: none; }
.tool-card[data-state="loading-engine"] .engine-status,
.tool-card[data-state="working"] .engine-status,
.tool-card[data-state="done"] .engine-status { display: none; }

/* =============================================================
   12. Responsive
   ============================================================= */
@media (min-width: 720px) {
  .tool-card { padding: 2.2rem; }
}

/* =============================================================
   13. Reduced-motion
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .engine-bar-fill, .file-progress-fill { transition: none; }
}