/* ===== Reset + variables ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; }

:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --ink: #1b1e24;
  --ink-soft: #5c626d;
  --line: #e3e5e9;
  --accent: #2f5fe0;
  --accent-ink: #ffffff;
  --preview-bg: #eef0f3;
  --radius: 12px;
  --radius-sm: 8px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --verde: #1f9d55;
  --amarillo: #b8860b;
  --rojo: #d7263d;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
input, select { font: inherit; color: inherit; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap;
}
.skip-link {
  position: fixed; top: -100px; left: 1rem; z-index: 999;
  padding: .6rem 1rem; background: var(--ink); color: #fff; border-radius: 8px;
}
.skip-link:focus { top: 1rem; }

/* ===== Topbar ===== */
.topbar { background: var(--ink); color: #fff; }
.topbar__inner { max-width: 1400px; margin: 0 auto; padding: .9rem 1.25rem; }
.topbar__brand { font-weight: 800; letter-spacing: .06em; font-size: .95rem; }

/* ===== Layout general ===== */
main { max-width: 1400px; margin: 0 auto; padding: 1.25rem; }

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 960px) {
  .layout { grid-template-columns: 34% 66%; align-items: start; }
  .panel--controls { order: 1; }
  .panel--preview { order: 2; position: sticky; top: 1rem; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}

/* ===== Field groups ===== */
.field-group { margin-bottom: 1.35rem; }
.field-label {
  display: block; font-size: .72rem; font-weight: 800; letter-spacing: .06em;
  color: var(--ink-soft); margin-bottom: .5rem;
}
.field-label-row { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: .5rem; }
.font-selected-name { font-size: .85rem; font-weight: 700; color: var(--accent); }

/* ===== Texto ===== */
.text-input-row { display: flex; align-items: center; gap: .5rem; }
#text-input {
  flex: 1; padding: .7rem .85rem; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  font-size: 1rem;
}
#text-input:focus { border-color: var(--accent); }
.char-counter { font-size: .78rem; color: var(--ink-soft); white-space: nowrap; }
.case-buttons { display: flex; gap: .4rem; margin-top: .5rem; }
.case-buttons button {
  padding: .35rem .6rem; border: 1px solid var(--line); border-radius: 6px; font-size: .75rem;
}
.case-buttons button:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Fuentes ===== */
.font-tabs, .tab-btn { display: inline-flex; }
.font-tabs { gap: .4rem; margin-bottom: .55rem; }
.tab-btn {
  padding: .4rem .8rem; border-radius: 999px; border: 1px solid var(--line);
  font-size: .72rem; font-weight: 700; letter-spacing: .04em;
}
.tab-btn.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }

.font-search {
  width: 100%; padding: .55rem .75rem; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  margin-bottom: .55rem; font-size: .9rem;
}

.font-categories { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: .6rem; }
.font-categories button {
  padding: .3rem .65rem; border: 1px solid var(--line); border-radius: 999px; font-size: .68rem; font-weight: 700;
}
.font-categories button.is-active { background: var(--accent); color: #fff; border-color: var(--accent); }

.font-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem;
  max-height: 340px; overflow-y: auto; padding-right: .2rem;
}
.font-card {
  display: flex; flex-direction: column; gap: .3rem; padding: .6rem .65rem;
  border: 1.5px solid var(--line); border-radius: var(--radius-sm); text-align: left;
  background: #fff; transition: border-color .15s var(--ease-out);
  min-width: 0;
}
.font-card:hover { border-color: var(--accent); }
.font-card.is-active { border-color: var(--accent); background: #eef2ff; }
.font-card__name { font-size: .66rem; font-weight: 700; color: var(--ink-soft); }
.font-card__sample {
  font-size: 1.15rem; line-height: 1.15; overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== Colores ===== */
.colors-row { display: flex; align-items: center; gap: .75rem; }
.color-field { display: flex; flex-direction: column; align-items: center; gap: .3rem; font-size: .72rem; color: var(--ink-soft); }
.color-field input[type=color] { width: 52px; height: 40px; border: 1px solid var(--line); border-radius: 8px; padding: 2px; background: #fff; }
.swap-btn {
  width: 34px; height: 34px; border-radius: 50%; border: 1.5px solid var(--line); font-size: 1.1rem;
  align-self: center;
}
.swap-btn:hover { border-color: var(--accent); color: var(--accent); }
.quick-palette { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .55rem; }
.quick-palette button { width: 24px; height: 24px; border-radius: 50%; border: 1px solid rgba(0,0,0,.12); }
.quick-palette button:hover { transform: scale(1.15); }

/* ===== Argolla / tabs de opciones ===== */
.ring-buttons { display: grid; grid-template-columns: repeat(2, 1fr); gap: .45rem; }
.ring-buttons button, .width-presets button, .size-presets button {
  padding: .55rem .5rem; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  font-size: .74rem; font-weight: 700; text-align: center;
}
.ring-buttons button.is-active, .width-presets button.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ===== Tamaño ===== */
.width-presets { display: grid; grid-template-columns: repeat(4, 1fr); gap: .4rem; margin-bottom: .6rem; }
.width-slider-row { display: flex; align-items: center; gap: .75rem; }
.width-slider-row input[type=range] { flex: 1; }
.width-slider-row output { font-size: .85rem; font-weight: 700; min-width: 52px; text-align: right; }
.auto-size-toggle { display: flex; align-items: center; gap: .5rem; margin: .7rem 0; font-size: .85rem; }
.size-presets { display: grid; grid-template-columns: repeat(3, 1fr); gap: .45rem; }
.size-presets small { font-weight: 400; opacity: .7; }

/* ===== Ajustes avanzados ===== */
.advanced { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: .7rem .85rem; margin-bottom: 1.35rem; }
.advanced summary { font-size: .72rem; font-weight: 800; letter-spacing: .06em; cursor: pointer; color: var(--ink-soft); }
.advanced__grid { display: grid; gap: .8rem; margin-top: .9rem; }
.advanced__grid label { display: flex; flex-direction: column; gap: .3rem; font-size: .78rem; color: var(--ink-soft); }
.advanced__grid output { font-weight: 700; color: var(--ink); }
.advanced [data-restore-advanced] {
  margin-top: .9rem; width: 100%; padding: .55rem; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: .75rem; font-weight: 700;
}
.advanced__grid small { font-weight: 400; opacity: .65; }

/* ===== Lotes ===== */
.batch-help { font-size: .78rem; color: var(--ink-soft); margin: .6rem 0; }
.batch-panel textarea {
  width: 100%; padding: .6rem .7rem; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  font: inherit; font-size: .85rem; resize: vertical;
}
.batch-row { display: flex; gap: .5rem; margin-top: .6rem; }
.batch-row select {
  padding: .5rem .6rem; border: 1.5px solid var(--line); border-radius: var(--radius-sm); font-size: .82rem;
}
.btn-generate--small { padding: .6rem 1rem; font-size: .78rem; flex: 1; }

/* ===== Generar / descargar ===== */
.btn-generate {
  width: 100%; padding: 1rem; background: var(--accent); color: #fff; border-radius: var(--radius-sm);
  font-weight: 800; font-size: .95rem; letter-spacing: .02em;
  transition: transform .12s var(--ease-out);
}
.btn-generate:hover { transform: translateY(-1px); }
.downloads { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; margin-top: .8rem; }
.downloads button {
  padding: .65rem .3rem; border: 1.5px solid var(--ink); border-radius: var(--radius-sm); font-weight: 700; font-size: .72rem;
}
.downloads button:hover { background: var(--ink); color: #fff; }
.export-status { margin-top: .6rem; font-size: .78rem; color: var(--ink-soft); min-height: 1.1em; }
.btn-reset { width: 100%; padding: .6rem; font-size: .75rem; color: var(--ink-soft); text-decoration: underline; }

/* ===== Preview ===== */
.preview-toolbar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: .5rem; margin-bottom: .8rem; }
.preview-toolbar__cam { display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; }
.preview-toolbar__cam button { padding: .35rem .6rem; border: 1px solid var(--line); border-radius: 6px; font-size: .68rem; font-weight: 700; }
.grid-toggle { display: flex; align-items: center; gap: .35rem; font-size: .72rem; color: var(--ink-soft); }

.preview-stage {
  position: relative; background: var(--preview-bg); border-radius: var(--radius-sm);
  min-height: 340px; display: flex; align-items: center; justify-content: center; overflow: hidden;
}
@media (min-width: 960px) { .preview-stage { min-height: 460px; } }

.preview2d, .preview3d { width: 100%; height: 100%; min-height: 340px; display: flex; align-items: center; justify-content: center; }
.preview2d svg { width: 92%; max-height: 90%; }
.preview3d { padding: 0; }
.viewer3d-fallback { padding: 2rem; text-align: center; color: var(--ink-soft); font-size: .85rem; }

.preview-empty {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--ink-soft); font-size: .95rem; pointer-events: none;
}

.model-info {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: .6rem;
  margin-top: .9rem; font-size: .78rem;
}
@media (min-width: 540px) { .model-info { grid-template-columns: repeat(5, 1fr); } }
.model-info div { display: flex; flex-direction: column; gap: .15rem; }
.model-info span { color: var(--ink-soft); font-size: .65rem; font-weight: 800; letter-spacing: .04em; }
.model-info strong { font-size: .88rem; }

.validation { margin-top: .9rem; padding: .8rem .9rem; border-radius: var(--radius-sm); background: #f8f9fb; border: 1px solid var(--line); }
.validation__badge { display: inline-block; padding: .3rem .7rem; border-radius: 999px; font-size: .72rem; font-weight: 800; color: #fff; margin-bottom: .5rem; }
.validation__badge--verde { background: var(--verde); }
.validation__badge--amarillo { background: var(--amarillo); }
.validation__badge--rojo { background: var(--rojo); }
.validation__msgs { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: .3rem; }
.validation__msgs li { font-size: .78rem; color: var(--ink-soft); }

/* ===== SEO / footer ===== */
.seo-copy { max-width: 720px; margin: 2.5rem auto 0; padding: 0 .25rem; color: var(--ink-soft); font-size: .9rem; }
.seo-copy h2 { font-size: 1.1rem; color: var(--ink); margin-bottom: .5rem; }
.ad-slot { max-width: 1400px; margin: 1.5rem auto 0; min-height: 90px; }
.site-footer { text-align: center; padding: 1.5rem; color: var(--ink-soft); font-size: .75rem; }

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; }
}