/* ===== Pantalla Negra — estilos ===== */

:root,
[data-theme='dark'] {
  --font-body: 'Satoshi', 'Inter', system-ui, sans-serif;
  --font-display: 'Satoshi', 'Inter', system-ui, sans-serif;

  /* Tipografía */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  /* Espaciado */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;

  /* Dark (tema por defecto del producto) */
  --color-bg: #0a0a0b;
  --color-surface: #131316;
  --color-surface-2: #1a1a1f;
  --color-surface-offset: #16161a;
  --color-border: #2a2a31;
  --color-divider: #222228;
  --color-text: #f2f2f3;
  --color-text-muted: #9a9aa3;
  --color-text-faint: #62626b;
  --color-primary: #4cc2ff;
  --color-primary-hover: #7ad6ff;
  --color-primary-active: #2aa8e8;
  --color-accent: #4cc2ff;
  --radius-sm: 0.5rem; --radius-md: 0.75rem; --radius-lg: 1rem; --radius-xl: 1.25rem;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.5);
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --content: 1120px;
}

[data-theme='light'] {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-2: #f0f1f4;
  --color-surface-offset: #eef0f3;
  --color-border: #d8dae0;
  --color-divider: #e4e6ea;
  --color-text: #15161a;
  --color-text-muted: #5b5d66;
  --color-text-faint: #8a8c95;
  --color-primary: #0a84ff;
  --color-primary-hover: #0070e0;
  --color-primary-active: #0060c0;
  --color-accent: #0a84ff;
  --shadow-sm: 0 1px 2px rgba(20,22,40,0.06);
  --shadow-md: 0 4px 16px rgba(20,22,40,0.08);
  --shadow-lg: 0 16px 40px rgba(20,22,40,0.12);
}

/* Base */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: none; text-size-adjust: none; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; scroll-behavior: smooth; scroll-padding-top: var(--space-16); }
body { min-height: 100dvh; line-height: 1.6; font-family: var(--font-body); font-size: var(--text-base); color: var(--color-text); background-color: var(--color-bg); }
img,svg,canvas { display: block; max-width: 100%; height: auto; }
ul,ol { list-style: none; }
input,button,textarea,select { font: inherit; color: inherit; }
h1,h2,h3,h4 { text-wrap: balance; line-height: 1.15; }
p,li { text-wrap: pretty; max-width: 72ch; }
::selection { background: color-mix(in oklab, var(--color-primary) 30%, transparent); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }

.skip-link { position: absolute; left: -9999px; top: 0; z-index: 200; background: var(--color-primary); color: #000; padding: var(--space-2) var(--space-4); border-radius: 0 0 var(--radius-md) 0; }
.skip-link:focus { left: 0; }

.container { width: 100%; max-width: var(--content); margin-inline: auto; padding-inline: var(--space-5); }

/* Header */
.header { position: sticky; top: 0; z-index: 50; background: color-mix(in oklab, var(--color-bg) 88%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--color-divider); }
.header-inner { display: flex; align-items: center; gap: var(--space-4); height: 64px; }
.brand { display: inline-flex; align-items: center; gap: var(--space-2); font-weight: 700; letter-spacing: -0.02em; }
.brand-mark { width: 28px; height: 28px; color: var(--color-primary); display: grid; place-items: center; }
.brand-mark svg { width: 100%; height: 100%; }
.brand-name { font-size: var(--text-base); }
.nav { display: flex; gap: var(--space-5); margin-inline-start: auto; }
.nav a { font-size: var(--text-sm); color: var(--color-text-muted); }
.theme-toggle { width: 38px; height: 38px; display: grid; place-items: center; border-radius: var(--radius-md); color: var(--color-text-muted); border: 1px solid var(--color-border); transition: all var(--transition); }
.theme-toggle:hover { color: var(--color-text); border-color: var(--color-primary); }
.theme-toggle svg { width: 18px; height: 18px; }
.github-link { margin-inline-start: auto; width: 38px; height: 38px; display: grid; place-items: center; border-radius: var(--radius-md); color: var(--color-text-muted); border: 1px solid var(--color-border); transition: all var(--transition); }
.github-link:hover { color: var(--color-text); border-color: var(--color-primary); }
.github-link svg { width: 20px; height: 20px; }
.lang-dropdown { position: relative; }
.lang-btn { width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; gap: 4px; border-radius: var(--radius-md); color: var(--color-text-muted); border: 1px solid var(--color-border); transition: all var(--transition); font-size: var(--text-xs); font-weight: 600; }
.lang-btn:hover { color: var(--color-text); border-color: var(--color-primary); }
.lang-btn svg { width: 18px; height: 18px; }
.lang-menu { position: absolute; top: calc(100% + 6px); right: 0; min-width: 130px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-md); padding: var(--space-1); z-index: 60; opacity: 0; visibility: hidden; transform: translateY(-6px); transition: all var(--transition); }
.lang-dropdown[data-open='true'] .lang-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-dropdown[data-open='true'] .lang-btn { color: var(--color-text); border-color: var(--color-primary); }
.lang-item { display: block; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); font-size: var(--text-sm); color: var(--color-text-muted); }
.lang-item:hover { background: var(--color-surface-2); color: var(--color-text); }
.lang-item.active { color: var(--color-primary); font-weight: 600; }
[data-theme='dark'] .icon-sun { display: none; }
[data-theme='light'] .icon-moon { display: none; }
.nav { margin-inline-start: 0; }
.header-inner { gap: var(--space-2); }
.github-link, .theme-toggle { flex-shrink: 0; }
@media (max-width: 640px) { .nav { display: none; } }

/* Hero */
.hero { padding-block: clamp(var(--space-12), 8vw, var(--space-24)); text-align: center; }
.eyebrow { font-size: var(--text-xs); color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.12em; font-weight: 500; margin-bottom: var(--space-4); }
.hero h1 { font-size: var(--text-2xl); font-weight: 700; letter-spacing: -0.03em; max-width: 16ch; margin-inline: auto; }
.lede { margin-top: var(--space-4); color: var(--color-text-muted); max-width: 56ch; margin-inline: auto; }

/* Preview */
.preview { margin: var(--space-10) auto 0; width: 100%; max-width: 760px; aspect-ratio: 16/9; background: var(--swatch, #000); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 1px solid var(--color-border); position: relative; overflow: hidden; transition: background var(--transition); }
.preview-fullscreen { position: absolute; inset: 0; width: 100%; height: 100%; display: grid; place-items: center; color: rgba(255,255,255,0.5); transition: color var(--transition); }
.preview-fullscreen:hover { color: rgba(255,255,255,0.9); }
.preview-fullscreen svg { width: 40px; height: 40px; }
.preview[data-light='true'] .preview-fullscreen { color: rgba(0,0,0,0.4); }
.preview[data-light='true'] .preview-fullscreen:hover { color: rgba(0,0,0,0.8); }

/* Botón principal */
.btn-primary { margin-top: var(--space-8); display: inline-flex; align-items: center; gap: var(--space-2); padding: var(--space-3) var(--space-6); background: var(--color-primary); color: #000; font-weight: 700; font-size: var(--text-sm); border-radius: var(--radius-full, 9999px); box-shadow: var(--shadow-md); transition: all var(--transition); }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-primary svg { width: 18px; height: 18px; }

/* Colores */
.colors { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-3); margin-top: var(--space-8); }
.color-chip { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); padding: var(--space-3); border-radius: var(--radius-md); border: 1px solid var(--color-border); background: var(--color-surface); transition: all var(--transition); min-width: 64px; }
.color-chip:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.color-chip.active { border-color: var(--color-primary); box-shadow: 0 0 0 2px color-mix(in oklab, var(--color-primary) 40%, transparent); }
.color-chip .swatch { width: 32px; height: 32px; border-radius: var(--radius-sm); background: var(--c); border: 1px solid var(--color-border); }
.color-chip .label { font-size: var(--text-xs); color: var(--color-text-muted); }
.hint { margin-top: var(--space-5); font-size: var(--text-sm); color: var(--color-text-muted); }
.hint strong { color: var(--color-text); }

/* Descarga */
.download { padding-block: var(--space-16); border-block: 1px solid var(--color-divider); background: var(--color-surface); }
.download h2 { font-size: var(--text-xl); text-align: center; letter-spacing: -0.02em; }
.section-sub { text-align: center; color: var(--color-text-muted); margin-top: var(--space-3); max-width: 50ch; margin-inline: auto; }
.download-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); margin-top: var(--space-10); }
@media (max-width: 720px) { .download-grid { grid-template-columns: 1fr; } }
.panel { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-6); }
.panel h3 { font-size: var(--text-sm); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: var(--space-4); }
.seg { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.seg-item { flex: 1 1 auto; min-width: 90px; text-align: center; padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); transition: all var(--transition); }
.seg-item:hover { border-color: var(--color-primary); }
.seg-item.active { border-color: var(--color-primary); background: color-mix(in oklab, var(--color-primary) 12%, var(--color-surface)); }
.seg-item strong { display: block; font-size: var(--text-sm); }
.seg-item small { font-size: var(--text-xs); color: var(--color-text-muted); }
.size-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-2); }
.size-item { padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); text-align: center; transition: all var(--transition); }
.size-item:hover { border-color: var(--color-primary); }
.size-item.active { border-color: var(--color-primary); background: color-mix(in oklab, var(--color-primary) 12%, var(--color-surface)); }
.size-item strong { display: block; font-size: var(--text-sm); }
.size-item small { font-size: var(--text-xs); color: var(--color-text-muted); }
.btn-download { display: flex; align-items: center; justify-content: center; gap: var(--space-2); width: 100%; max-width: 460px; margin: var(--space-8) auto 0; padding: var(--space-4) var(--space-6); background: var(--color-primary); color: #000; font-weight: 700; font-size: var(--text-base); border-radius: var(--radius-full, 9999px); box-shadow: var(--shadow-md); transition: all var(--transition); }
.btn-download:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.btn-download:disabled { opacity: 0.7; cursor: default; transform: none; }
.btn-download svg { width: 20px; height: 20px; }
.meta { text-align: center; margin-top: var(--space-4); font-size: var(--text-xs); color: var(--color-text-muted); }

/* Contenido */
.content { padding-block: var(--space-16); }
.content-inner { max-width: 760px; }
.content h2 { font-size: var(--text-xl); margin-top: var(--space-12); letter-spacing: -0.02em; scroll-margin-top: var(--space-16); }
.content h2:first-of-type { margin-top: 0; }
.content h3 { font-size: var(--text-lg); margin-top: var(--space-8); scroll-margin-top: var(--space-16); }
.content p { margin-top: var(--space-4); color: var(--color-text-muted); }
.content strong { color: var(--color-text); }
.steps { margin-top: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); counter-reset: step; }
.steps li { padding-left: var(--space-8); position: relative; color: var(--color-text-muted); }
.steps li::before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: 0; width: 28px; height: 28px; display: grid; place-items: center; background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-full, 9999px); font-size: var(--text-xs); font-weight: 700; color: var(--color-text); }
.steps strong { color: var(--color-text); }
.tip { margin-top: var(--space-6); padding: var(--space-4) var(--space-5); background: var(--color-surface-2); border-left: 3px solid var(--color-primary); border-radius: var(--radius-sm); }
.faq-item { border-bottom: 1px solid var(--color-divider); padding-block: var(--space-5); }
.faq-item h3 { margin-top: 0; font-size: var(--text-base); }
.color-links { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-4); }
.link-btn { text-align: left; font-size: var(--text-base); padding: var(--space-2) 0; color: var(--color-text-muted); transition: color var(--transition); }
.link-btn:hover { color: var(--color-primary); }

/* Beneficios */
.benefits { border-top: 1px solid var(--color-divider); background: var(--color-surface); }
.benefits-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); padding-block: var(--space-12); }
@media (max-width: 720px) { .benefits-grid { grid-template-columns: repeat(2, 1fr); } }
.benefit { display: flex; align-items: center; gap: var(--space-3); }
.b-icon { width: 40px; height: 40px; flex-shrink: 0; display: grid; place-items: center; background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-primary); }
.benefit strong { display: block; font-size: var(--text-sm); }
.benefit small { font-size: var(--text-xs); color: var(--color-text-muted); }

/* Footer */
.footer { border-top: 1px solid var(--color-divider); padding-block: var(--space-8); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); }
.copy { font-size: var(--text-xs); color: var(--color-text-muted); }
.copy a { color: var(--color-primary); font-weight: 600; }
.copy a:hover { color: var(--color-primary-hover); text-decoration: underline; }
.footer-nav { display: flex; gap: var(--space-4); }
.footer-nav a { font-size: var(--text-xs); color: var(--color-text-muted); }

/* Overlay pantalla completa */
.fs-overlay { position: fixed; inset: 0; background: var(--fs-color, #000); z-index: 9999; display: grid; place-items: end center; padding-bottom: var(--space-6); }
.fs-overlay[hidden] { display: none; }
.fs-exit { color: rgba(255,255,255,0.35); font-size: var(--text-sm); padding: var(--space-2) var(--space-4); border: 1px solid rgba(255,255,255,0.15); border-radius: var(--radius-full, 9999px); backdrop-filter: blur(4px); transition: all var(--transition); }
.fs-exit:hover { color: rgba(255,255,255,0.9); border-color: rgba(255,255,255,0.4); }
.fs-overlay[data-light='true'] .fs-exit { color: rgba(0,0,0,0.35); border-color: rgba(0,0,0,0.2); }
.fs-overlay[data-light='true'] .fs-exit:hover { color: rgba(0,0,0,0.8); }