/* =========================================================
   TZA — base compartida (juego + home)
   Paleta del retrato + dos acentos tomados de la ilustración
   ========================================================= */
:root{
  --white:#E4E2DE;     /* Blanco grisáceo · fondo principal */
  --stone:#CFC3B6;     /* Beige piedra · tonos intermedios */
  --taupe:#7E746B;     /* Gris topo · sombras suaves */
  --charcoal:#3F3D3E;  /* Gris carbón · volumen, secundarios */
  --black:#141315;     /* Negro profundo · contraste máximo */

  /* acentos del retrato: se usan poco, como recompensa */
  --lime:#B0E159;
  --violet:#7B4DD5;

  /* tokens semánticos: cambian con el modo oscuro */
  --bg:#E4E2DE;          /* fondo de página */
  --bg-alt:#CFC3B6;      /* secciones alternas */
  --surface:#E4E2DE;     /* tarjetas sobre fondo alterno */
  --surface-2:rgba(207,195,182,.38); /* campos, chips, badges */
  --text:#141315;
  --text-2:#3F3D3E;
  --muted:#7E746B;
  --line:rgba(20,19,21,.14);
  --line-2:rgba(20,19,21,.28);
  --deep:#141315;        /* secciones siempre oscuras */
  --deep-2:#3F3D3E;
  --nav-bg:rgba(228,226,222,.74);
  --shadow:rgba(20,19,21,.25);
  --burst:#CFC3B6;
  --hl:rgba(176,225,89,.75);  /* subrayado de los títulos */
  --error:#A8432F;
  --ink:var(--text);
  --line-light:rgba(228,226,222,.16);
  color-scheme:light;

  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease-io:cubic-bezier(.7,0,.2,1);
  --gut:clamp(16px,6vw,96px);
}

[data-theme="dark"]{
  --bg:#141315;
  --bg-alt:#1C1B1D;
  --surface:#242325;
  --surface-2:rgba(63,61,62,.5);
  --text:#E4E2DE;
  --text-2:#CFC3B6;
  --muted:#A39A90;
  --line:rgba(228,226,222,.12);
  --line-2:rgba(228,226,222,.28);
  --deep:#0B0A0C;
  --deep-2:#2A292B;
  --nav-bg:rgba(28,27,29,.74);
  --shadow:rgba(0,0,0,.55);
  --burst:#2A292B;
  --hl:rgba(123,77,213,.6);
  --error:#E0806F;
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;cursor:pointer}
::selection{background:var(--text);color:var(--bg)}

.serif{font-family:'Instrument Serif',Georgia,serif;font-style:italic;font-weight:400}
.mono{font-family:'Space Mono',ui-monospace,monospace;letter-spacing:.06em}

:focus-visible{outline:2px solid var(--violet);outline-offset:3px;border-radius:4px}

/* ---------- grano sutil sobre todo ---------- */
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:90;opacity:.06;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
[data-theme="dark"] .grain{mix-blend-mode:screen;opacity:.035}

/* =========================================================
   BOTONES — microinteracciones
   · relleno que nace desde donde entra el cursor
   · texto que "rueda" hacia arriba
   · flecha que se desplaza
   · presión (scale) al hacer click
   · onda al soltar
   (el desplazamiento magnético va por la propiedad `translate`,
    así no choca con las animaciones de GSAP sobre `transform`)
   ========================================================= */
.btn{
  --btn-bg:var(--text); --btn-fg:var(--bg);
  --btn-fill:var(--lime); --btn-fill-fg:var(--black);
  --btn-bd:transparent;
  position:relative;isolation:isolate;overflow:hidden;
  display:inline-flex;align-items:center;justify-content:center;gap:.65em;
  height:48px;padding:0 24px;border-radius:999px;
  border:1px solid var(--btn-bd);background:var(--btn-bg);color:var(--btn-fg);
  font-family:'Inter',system-ui,sans-serif;font-size:14px;font-weight:500;letter-spacing:-.01em;
  text-decoration:none;white-space:nowrap;cursor:pointer;
  -webkit-tap-highlight-color:transparent;user-select:none;
  transition:color .45s var(--ease-out),border-color .45s var(--ease-out),scale .25s var(--ease-out);
}
.btn::before{ /* relleno */
  content:'';position:absolute;z-index:-1;
  left:var(--fx,50%);top:var(--fy,50%);
  width:var(--fs,320px);height:var(--fs,320px);border-radius:50%;
  background:var(--btn-fill);
  transform:translate(-50%,-50%) scale(0);
  transition:transform .6s var(--ease-out);
}
.btn:hover::before,.btn.is-hover::before{transform:translate(-50%,-50%) scale(1)}
.btn:hover,.btn.is-hover{color:var(--btn-fill-fg)}
.btn:active{scale:.955}
.btn:focus-visible{outline:2px solid var(--violet);outline-offset:3px}
.btn[disabled]{cursor:progress;opacity:.85}

.btn-label{position:relative;display:inline-block;overflow:hidden;line-height:1.25;vertical-align:middle}
.btn-label>span{display:block;transition:transform .55s var(--ease-io)}
.btn-label::after{
  content:attr(data-text);position:absolute;left:0;top:100%;width:100%;
  transition:transform .55s var(--ease-io);
}
.btn:hover .btn-label>span,.btn:hover .btn-label::after{transform:translateY(-100%)}

.btn-ico{width:16px;height:16px;flex-shrink:0;transition:transform .5s var(--ease-out)}
.btn:hover .btn-ico{transform:translateX(3px) rotate(-45deg)}
.btn-ico--down{}
.btn:hover .btn-ico--down{transform:translateY(2px)}

.btn-ripple{
  position:absolute;z-index:-1;border-radius:50%;pointer-events:none;
  width:12px;height:12px;margin:-6px 0 0 -6px;
  background:currentColor;opacity:.28;transform:scale(0);
  animation:ripple .7s var(--ease-out) forwards;
}
@keyframes ripple{to{transform:scale(28);opacity:0}}

/* variantes */
.btn--dark{}
.btn--light{--btn-bg:var(--white);--btn-fg:var(--black);--btn-fill:var(--lime);--btn-fill-fg:var(--black)}
.btn--ghost{--btn-bg:transparent;--btn-fg:var(--text);--btn-bd:var(--line-2);--btn-fill:var(--text);--btn-fill-fg:var(--bg)}
.btn--ghost-light{--btn-bg:transparent;--btn-fg:var(--white);--btn-bd:rgba(228,226,222,.3);--btn-fill:var(--white);--btn-fill-fg:var(--black)}
.btn--sm{height:40px;padding:0 18px;font-size:13px}
.btn--lg{height:58px;padding:0 32px;font-size:15px}

/* envoltura magnética: zona de atracción un poco más grande que el botón */
[data-magnetic]{will-change:translate}
[data-magnetic] .magnetic-inner{display:inline-flex;align-items:center;gap:inherit;will-change:translate}

/* ---------- link con subrayado que barre ---------- */
.ulink{position:relative;color:inherit;text-decoration:none}
.ulink::after{
  content:'';position:absolute;left:0;right:0;bottom:-2px;height:1px;background:currentColor;
  transform:scaleX(0);transform-origin:right;transition:transform .5s var(--ease-io);
}
.ulink:hover::after{transform:scaleX(1);transform-origin:left}

/* ---------- cortina de transición entre páginas ---------- */
.curtain{
  position:fixed;inset:0;z-index:200;background:var(--black);pointer-events:none;
  display:grid;place-items:center;
}
.curtain img{height:56px;width:auto;opacity:.9}
.curtain.is-closed{transform:translateY(0)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* ---------- saltar al contenido (teclado) ---------- */
.skip-link{position:fixed;left:16px;top:-80px;z-index:300;background:var(--text);color:var(--bg);padding:10px 16px;border-radius:999px;font-size:14px;text-decoration:none;transition:top .3s var(--ease-out)}
.skip-link:focus{top:16px}