/* =======================================================================
   Blog GSI — styles.css (bonito, moderno y accesible)
   Paleta (tema oscuro sobrio)
   ======================================================================= */
:root{
  --black-olive:#313628ff;
  --davys-gray:#595358ff;
  --battleship-gray:#857f74ff;
  --ash-gray:#a4ac96ff;
  --tea-green:#cadf9eff;

  --bg: var(--black-olive);
  --text:#f5f7f4;
  --muted: color-mix(in srgb, var(--tea-green) 40%, #fff 60%);
  --accent: var(--tea-green);
  --accent-ink:#1f2a16;

  --surface-0:#22271b;
  --surface-1:#2a3022;
  --surface-2:#343b29;
  --surface-3:#404934;

  --ring: color-mix(in srgb, var(--accent) 65%, transparent);
  --chip: color-mix(in srgb, var(--tea-green) 28%, #fff 72%);

  --radius:16px;
  --radius-sm:12px;
  --shadow-lg: 0 18px 38px rgba(0,0,0,.42);
  --shadow-md: 0 12px 28px rgba(0,0,0,.34);
  --shadow-sm: 0 6px 16px rgba(0,0,0,.28);

  --maxw: 1120px;
}

/* Reset básico y tipografía */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--text);
  background:
    radial-gradient(80vw 80vw at 50% -20%, rgba(255,255,255,.06), transparent),
    linear-gradient(180deg, rgba(255,255,255,.02), transparent 22%),
    var(--bg);
  font: 16px/1.65 Inter, system-ui, Segoe UI, Roboto, Arial, sans-serif;
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:22px}

/* Enlaces y foco accesible */
a{color:inherit}
:focus-visible{
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: 10px;
}

/* =======================================================================
   Loader bonito (global)
   ======================================================================= */
.loader{
  position:fixed; inset:0; display:grid; place-items:center;
  background:
    radial-gradient(65vw 65vw at 50% -15%, rgba(255,255,255,.08), transparent),
    var(--bg);
  z-index: 9999;
  transition: opacity .35s ease, visibility .35s ease;
}
.loader.hidden{opacity:0; visibility:hidden}
.loader-inner{display:grid; place-items:center; gap:12px; text-align:center}
.loader-ring{
  width:64px; height:64px; border-radius:50%;
  border:4px solid rgba(255,255,255,.15);
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
  filter: drop-shadow(0 4px 10px rgba(0,0,0,.2));
}
.loader-mark{
  display:grid; place-items:center;
  width:56px; height:56px; border-radius:50%;
  background: var(--accent); color: var(--accent-ink); font-weight:800;
  box-shadow: var(--shadow-sm);
}
.loader-text{ color: var(--muted); font-size:.95rem }
@keyframes spin{to{transform:rotate(360deg)}}

/* =======================================================================
   Header + Nav (desktop) y Drawer (móvil off-canvas derecha → izquierda)
   ======================================================================= */
.site-header{
  position:sticky; top:0; z-index: 800;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:14px 18px;
  background: color-mix(in srgb, var(--surface-1) 85%, transparent);
  backdrop-filter: blur(8px);
  border:1px solid rgba(255,255,255,.08);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
}
.brand{display:flex;align-items:center;gap:12px}
.logo-btn{
  width:54px;height:54px;border-radius:50%;
  display:grid;place-items:center;
  text-decoration:none;font-weight:900;letter-spacing:.5px;
  background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #fff 30%));
  color: var(--accent-ink);
  box-shadow: var(--shadow-md);
}
.brand small{color:var(--muted)}

.nav-inline{display:flex;gap:10px;flex-wrap:wrap}
.nav-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;border-radius:999px;
  background: color-mix(in srgb, var(--surface-2) 80%, transparent);
  border:1px solid rgba(255,255,255,.08);
  text-decoration:none;
  transition: transform .18s ease, background .18s ease, opacity .18s ease;
}
.nav-link:hover{ transform: translateY(-2px) scale(1.02); background: color-mix(in srgb, var(--surface-2) 92%, transparent);}
.nav-link[aria-current="page"]{ outline:2px solid var(--accent); outline-offset:2px; }

/* Botones móvil */
.nav-toggle,.nav-close{
  background: color-mix(in srgb, var(--surface-2) 85%, transparent);
  border:1px solid rgba(255,255,255,.15);
  color:var(--text); padding:10px 12px; border-radius:12px; cursor:pointer;
  transition: filter .15s ease, transform .15s ease;
}
.nav-toggle:hover,.nav-close:hover{ filter: brightness(1.05); transform: translateY(-1px); }

/* Drawer */
.nav-drawer{
  position: fixed; top:0; right:-100%; height:100vh; width:min(86vw, 360px);
  background: color-mix(in srgb, var(--surface-1) 85%, transparent);
  backdrop-filter: blur(10px);
  border-left:1px solid rgba(255,255,255,.12);
  box-shadow: -18px 0 48px rgba(0,0,0,.45);
  display:flex; flex-direction:column; padding:16px; gap:12px;
  transition: right .28s ease-in-out;
  z-index: 9000;
  overflow-y:auto;
  -webkit-overflow-scrolling: touch;
}
.nav-drawer.open{ right:0; }
.nav-drawer-head{ display:flex; align-items:center; justify-content:space-between; }
.nav-drawer-title{ font-weight:800; color: var(--accent); letter-spacing:.3px; }
.nav-drawer-links{ display:grid; gap:10px; }
.nav-drawer .nav-link{
  background: color-mix(in srgb, var(--surface-2) 86%, transparent);
  border-color: rgba(255,255,255,.12);
}

/* Backdrop */
.backdrop{
  position: fixed; inset:0; background: rgba(0,0,0,.46);
  z-index: 8900; opacity:0; visibility:hidden; transition: opacity .25s ease;
}
.backdrop.show{ opacity:1; visibility:visible; }

/* =======================================================================
   Hero / secciones / tarjetas
   ======================================================================= */
.hero{
  padding:38px 14px; text-align:center;
  background:
    radial-gradient(70vw 70vw at 50% -10%, rgba(255,255,255,.06), transparent),
    linear-gradient(180deg, rgba(255,255,255,.02), transparent 40%);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.hero h1{
  margin:0;
  color: var(--accent);
  font-size: clamp(1.6rem, 3.8vw, 2.4rem);
  letter-spacing: .2px;
  text-shadow: 0 1px 0 rgba(0,0,0,.35);
}
.hero p{max-width:760px;margin:10px auto 0;color:var(--muted)}

.card{
  margin-top:18px;
  background: color-mix(in srgb, var(--surface-1) 88%, transparent);
  border:1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding:20px;
}
.section-title{
  margin:0 0 12px 0; padding-bottom:8px;
  border-bottom: 2px dashed rgba(255,255,255,.12);
  color: var(--accent);
  letter-spacing:.3px;
}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.tile{
  background: var(--surface-2);
  border:1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-sm);
  padding:16px;
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, filter .18s ease;
}
.tile:hover{ transform: translateY(-2px); filter: brightness(1.03); }
.tile h3{ margin:0 0 6px 0; color: var(--accent); font-size:1.08rem }

.badge{
  display:inline-block; background: var(--chip); color: #1e2a15;
  padding:6px 10px; border-radius: 999px; font-weight:700; font-size:.8rem
}
.cta{
  display:inline-block; margin-top:8px;
  background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 72%, #fff 28%));
  color: var(--accent-ink);
  padding:12px 14px; border-radius:12px; text-decoration:none; font-weight:800;
  border:1px solid rgba(0,0,0,.18);
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, filter .15s ease;
}
.cta:hover{ transform: translateY(-1px); filter: brightness(1.03); }

/* =======================================================================
   Página: Clases — lista de semanas + playground
   ======================================================================= */
.weeks-list{display:flex;flex-direction:column;gap:10px;margin-bottom:8px}
.week-btn{
  text-align:left; cursor:pointer;
  background: color-mix(in srgb, var(--surface-3) 85%, transparent);
  color:var(--text);
  border:1px solid rgba(255,255,255,.12);
  border-radius:12px; padding:12px 14px;
  transition: transform .18s ease, background .18s ease;
}
.week-btn:hover{ transform: translateX(4px); }
.week-btn.active{ background: var(--accent); color: var(--accent-ink); border-color: transparent; }

.week-content{display:none;margin-top:12px}
.week-content.active{display:block}

.code-playground{
  margin-top:14px; overflow:hidden;
  background: var(--surface-2);
  border:1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}
.code-toolbar{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:10px 12px;background: color-mix(in srgb, var(--surface-3) 85%, transparent);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.code-toolbar button{
  background: var(--accent); color: var(--accent-ink);
  border:0; padding:10px 12px; border-radius:10px; cursor:pointer; font-weight:800;
  box-shadow: var(--shadow-sm);
}
.code-area{display:grid;grid-template-columns:1fr 1fr}
.code-area textarea{
  min-height:240px; border:0; border-right:1px solid rgba(255,255,255,.08);
  padding:12px; background:#1f2318; color:#e9f6e0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.code-area iframe{min-height:240px; border:0; background:#fff}

/* =======================================================================
   Página: Comentarios
   ======================================================================= */
.comment-form input,.comment-form textarea{
  width:100%;
  padding:12px;
  border:1px solid rgba(255,255,255,.18);
  border-radius:12px;
  background: #202518;
  color: var(--text);
}
.comment-item{
  background: var(--surface-2);
  border:1px solid rgba(255,255,255,.1);
  border-radius:12px;
  padding:12px;
  box-shadow: var(--shadow-sm);
}
.comment-item .name{font-weight:800;color:var(--accent)}

/* =======================================================================
   Página: Contáctanos — formulario con etiquetas flotantes
   ======================================================================= */
.contact-card{ background: color-mix(in srgb, var(--surface-2) 88%, transparent); }
.contact-form{ margin-top:8px }
.form-grid{ display:grid; grid-template-columns:repeat(2,minmax(260px,1fr)); gap:16px }
.form-field-full{ grid-column:1/-1 }

.form-field{
  position:relative;
  background: color-mix(in srgb, var(--surface-3) 90%, transparent);
  border:1px solid rgba(255,255,255,.1);
  border-radius: 14px;
  padding: 16px 14px 12px 46px;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.form-field:focus-within{
  border-color: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--surface-3) 94%, transparent);
}
.field-icon{
  position:absolute; left:12px; top:16px; width:20px; height:20px;
  color: var(--accent); opacity:.95;
}
.form-field input,.form-field textarea{
  width:100%; border:0; outline:0; background:transparent; color:var(--text);
  font: inherit; line-height:1.55;
}
.form-field textarea{ resize:vertical; min-height:140px; }

.form-field label{
  position:absolute; left:46px; top:14px; pointer-events:none;
  color: var(--battleship-gray); font-size:.96rem;
  transform-origin:left top; transition: transform .18s ease, color .18s ease, opacity .18s ease;
}
.form-field input::placeholder,.form-field textarea::placeholder{ color:transparent }
.form-field input:focus + label,
.form-field input:not(:placeholder-shown) + label,
.form-field textarea:focus + label,
.form-field textarea:not(:placeholder-shown) + label{
  transform: translateY(-12px) scale(.86);
  color: var(--accent);
  opacity: .95;
}
.field-hint{ display:block; margin-top:6px; color:var(--muted); font-size:.86rem }

.was-validated input:invalid,.was-validated textarea:invalid{ box-shadow: 0 0 0 4px rgba(255,122,122,.35) }
.was-validated input:valid,.was-validated textarea:valid{ box-shadow: 0 0 0 4px rgba(144,211,107,.35) }

.form-actions{ display:flex; gap:10px; flex-wrap:wrap; margin-top:10px }
.btn-primary{
  display:inline-flex; align-items:center; gap:10px;
  background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 72%, #fff 28%));
  color: var(--accent-ink); border:1px solid rgba(0,0,0,.12);
  padding:12px 16px; border-radius:12px; font-weight:800; text-decoration:none;
  transition: transform .15s ease, filter .15s ease; box-shadow: var(--shadow-sm);
}
.btn-primary:hover{ transform: translateY(-1px); filter: brightness(1.04) }
.btn-ghost{
  display:inline-flex; align-items:center; gap:10px;
  background: transparent; color: var(--text);
  border:1px solid rgba(255,255,255,.22);
  padding:12px 16px; border-radius:12px; text-decoration:none;
}
.btn-ghost:hover{ background: rgba(255,255,255,.06) }

/* =======================================================================
   Footer
   ======================================================================= */
.footer-icons{display:flex;gap:10px;justify-content:center;margin-top:18px}
.footer-btn{
  width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;
  background: var(--accent); color: var(--accent-ink);
  text-decoration:none; transition: transform .15s ease, filter .15s ease;
  box-shadow: var(--shadow-sm);
}
.footer-btn:hover{ transform: translateY(-1px) scale(1.03); filter: brightness(1.03); }
.footer-text,.footer-credits{ text-align:center; font-size:14px; color: var(--muted); margin-top:8px }

/* =======================================================================
   Utilidades
   ======================================================================= */
.badge + .section-title{ margin-top:8px }
hr{border:0;border-top:1px dashed rgba(255,255,255,.14);margin:16px 0}

/* =======================================================================
   Responsive
   ======================================================================= */
@media (max-width: 992px){
  .nav-inline{ display:none }
  .nav-toggle{ display:inline-flex; align-items:center; gap:8px }
}
@media (max-width: 820px){
  .form-grid{ grid-template-columns: 1fr }
  .code-area{ grid-template-columns: 1fr }
  .cta, .btn-primary, .btn-ghost{ width:100%; text-align:center }
}
@media (max-width: 460px){
  .logo-btn{ width:48px; height:48px }
  .brand-text small{ display:none }
}

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