:root{
  --fons-1:#030607;
  --fons-2:#0b1220;
  --blau:#4cc9f0;
  --blau2:#00b4d8;
  --text:#ffffff;
  --vidre:rgba(255,255,255,0.06);
  --contorn:rgba(255,255,255,0.12);
  --radius:22px;

  --fs-xxl:clamp(1.9rem,5vw,3.8rem);
  --fs-xl:clamp(1.6rem,3.2vw,2.6rem);
  --fs-lg:clamp(1.2rem,2vw,1.4rem);
  --fs-md:1.05rem;
  --fs-sm:.95rem;
}

*{box-sizing:border-box}

html,body{
  height:100%;
  margin:0;
  padding:0;
  overflow-x:hidden;
}

html,body{
  background:linear-gradient(180deg,var(--fons-1),var(--fons-2)) fixed;
  color:var(--text);
  font-family:'Montserrat',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,video{max-width:100%;height:auto;display:block}
svg{max-width:100%}
button{font:inherit}
a{color:inherit}

html{scrollbar-width:thin;scrollbar-color:var(--blau) transparent}
*::-webkit-scrollbar{width:10px;background:transparent}
*::-webkit-scrollbar-thumb{
  background:linear-gradient(180deg,var(--blau),var(--blau2));
  border-radius:10px;border:2px solid transparent;background-clip:padding-box;
}

.promo-bar{
  position:sticky;top:0;z-index:10000;
  display:flex;justify-content:center;align-items:center;gap:.5rem;
  padding:.65rem 1rem;
  background:
    linear-gradient(90deg,rgba(76,201,240,.22),rgba(0,180,216,.22)),
    linear-gradient(0deg,rgba(255,255,255,.02),rgba(255,255,255,0));
  border-bottom:1px solid var(--contorn);
  backdrop-filter:blur(8px);
  text-shadow:0 8px 20px rgba(0,0,0,.35);
  font-weight:800;
}

#cursor{
  position:fixed;
  left:0;top:0;
  z-index:9999;
  pointer-events:none;
  width:90px;height:90px;
  margin:-45px 0 0 -45px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(76,201,240,.22) 0%,rgba(76,201,240,.12) 45%,rgba(76,201,240,.06) 70%,transparent 100%);
  filter:blur(18px);
  transition:transform .08s linear;
  mix-blend-mode:screen;
  will-change: transform, filter, opacity;
}
@media (pointer:coarse){#cursor{display:none}}

@keyframes glowPulse{
  0%{ opacity:.48; filter:blur(24px) saturate(120%); transform:translate3d(0,0,0) scale(1); }
  50%{ opacity:.62; filter:blur(28px) saturate(155%); transform:translate3d(0,0,0) scale(1.03); }
  100%{ opacity:.48; filter:blur(24px) saturate(120%); transform:translate3d(0,0,0) scale(1); }
}

@keyframes glowDrift{
  0%{ transform:translate3d(0,0,0); }
  50%{ transform:translate3d(10px,-8px,0); }
  100%{ transform:translate3d(0,0,0); }
}

.llum-fons{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(80vmax 80vmax at 50% -10%, rgba(0,155,255,.16), transparent 60%),
    radial-gradient(70vmax 70vmax at 15% 35%, rgba(0,170,255,.26), transparent 62%),
    radial-gradient(75vmax 75vmax at 85% 75%, rgba(0,120,210,.22), transparent 62%),
    radial-gradient(60vmax 60vmax at 65% 15%, rgba(0,140,255,.18), transparent 64%),
    radial-gradient(55vmax 55vmax at 30% 85%, rgba(50,200,255,.16), transparent 66%);
  mix-blend-mode:screen;
  opacity:.52;
  filter:blur(24px) saturate(120%);
  transform:translate3d(0,0,0);
  will-change: opacity, filter, transform;
  animation: glowPulse 10s ease-in-out infinite, glowDrift 16s ease-in-out infinite;
}

.seccio{padding:2.2rem 1rem;position:relative;z-index:1}
.contenidor{width:min(1100px,92vw);margin:0 auto}

.titol{
  margin:0 0 .6rem;font-weight:900;
  font-size:var(--fs-xl);
  letter-spacing:.2px;
  text-shadow:0 10px 30px rgba(0,0,0,.45);
  background:linear-gradient(90deg,#fff 0%, #e9f8ff 50%, #fff 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

.subtitol{margin:0 0 1.2rem;font-weight:700;color:#e5f6ff;font-size:var(--fs-sm);opacity:.95}

.card{
  position:relative;
  background:
    radial-gradient(120% 60% at 10% 0%, rgba(255,255,255,.08), transparent 60%),
    linear-gradient(180deg,var(--vidre),rgba(255,255,255,.03));
  border:1px solid var(--contorn);
  padding:1.15rem;
  border-radius:var(--radius);
  box-shadow:0 14px 36px rgba(0,0,0,.38), inset 0 0 40px rgba(76,201,240,.10);
}

.grid{display:grid;gap:1rem}
.grid-2{grid-template-columns:repeat(2,minmax(240px,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(220px,1fr))}
@media(max-width:900px){.grid-2,.grid-3{grid-template-columns:1fr}}

.input, select, textarea{
  width:100%;
  padding:.85rem 1rem;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.15);
  background:rgba(255,255,255,.08);
  color:#fff;
  font-weight:700;
  outline:none;
}

textarea{min-height:110px;resize:vertical}

.label{font-weight:900;font-size:.9rem;color:#dff4ff;margin:.2rem 0 .3rem;display:block}
.small{font-size:.9rem;opacity:.9;color:#d7f1ff}

.row{display:flex;gap:.8rem;flex-wrap:wrap}
.row>*{flex:1}

.boto{
  position:relative;
  display:inline-block;
  font-weight:900;
  text-decoration:none;
  padding:.95rem 1.2rem;
  border-radius:14px;
  border:1px solid var(--contorn);
  color:#001018;
  background:linear-gradient(90deg,var(--blau),var(--blau2));
  box-shadow:0 12px 28px rgba(76,201,240,.26);
  cursor:pointer;
}

.boto.sec{
  background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.03));
  color:#fff;
}

.nav{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:1rem 1rem;
  border-bottom:1px solid var(--contorn);
  background:rgba(0,0,0,.22);
  backdrop-filter:blur(8px);
  position:sticky;top:0;z-index:50;
}

.nav a{font-weight:900;text-decoration:none}

.pills{display:flex;gap:.5rem;flex-wrap:wrap}

.pill{
  padding:.35rem .6rem;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.06);
  font-weight:900;font-size:.75rem;color:#dff4ff;
}

.alert{
  padding:.8rem 1rem;border-radius:14px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.06);
  font-weight:800
}

.alert.ok{border-color:rgba(34,255,195,.35)}
.alert.err{border-color:rgba(255,143,143,.35)}

.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:.7rem .6rem;border-bottom:1px solid rgba(255,255,255,.12);text-align:left}
.table th{font-weight:900;color:#dff4ff}

.kpis{display:flex;gap:1rem;flex-wrap:wrap}
.kpi{flex:1;min-width:190px}
.kpi-num{font-weight:900;font-size:2rem;color:var(--blau)}

.footer{padding:2rem 1rem;text-align:center;opacity:.85}

/* ===== EXAM UI IMPROVEMENTS ===== */

.option-card{
  display:flex;
  gap:.7rem;
  align-items:flex-start;
  cursor:pointer;
}

.exam-actions{
  justify-content:space-between;
  align-items:center;
  gap:1rem;
}

.exam-right{
  display:flex;
  justify-content:flex-end;
  align-items:center;
}

.boto-final{
  min-width:240px;
  justify-content:center;
  text-align:center;
  border-radius:14px;
  padding:.9rem 1.2rem;
  white-space:nowrap;
}

.progress-track{
  height:12px;
  border-radius:999px;
  border:1px solid var(--contorn);
  background:rgba(255,255,255,.06);
  overflow:hidden;
  box-shadow: inset 0 0 20px rgba(0,0,0,.25);
}

.progress-fill{
  height:100%;
  width:0;
  border-radius:999px;
  background:linear-gradient(90deg,var(--blau),var(--blau2));
  transition: width .65s cubic-bezier(.2,.8,.2,1);
  position:relative;
}

.progress-fill::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(120deg,
    rgba(255,255,255,0) 0%,
    rgba(255,255,255,.22) 30%,
    rgba(255,255,255,0) 60%);
  transform:translateX(-120%);
  animation:progressShine 2.6s ease-in-out infinite;
  mix-blend-mode:screen;
  opacity:.7;
}

@keyframes progressShine{
  0%{transform:translateX(-120%)}
  45%{transform:translateX(120%)}
  100%{transform:translateX(120%)}
}

body.is-submitting #cursor{ display:none; }

select.input,
select {
  appearance:none;
  -webkit-appearance:none;
  -moz-appearance:none;

  width:100%;
  padding:.9rem 1rem;
  padding-right:3rem;

  border-radius:14px;
  border:1px solid var(--contorn);

  background:
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));

  color:#fff;
  font-weight:700;
  font-size:.95rem;

  cursor:pointer;
  transition:border .25s ease, box-shadow .25s ease, background .25s ease;
}

select:hover { border-color: var(--blau); }

select:focus{
  outline:none;
  border-color: var(--blau2);
  box-shadow: 0 0 0 3px rgba(76,201,240,.25);
}

select{
  background-image:
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02)),
    url("data:image/svg+xml;utf8,<svg fill='%234cc9f0' height='20' viewBox='0 0 24 24' width='20' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/></svg>");
  background-repeat:no-repeat, no-repeat;
  background-position:center, right 1rem center;
  background-size:auto, 18px;
}

select option{
  background:#0b1220;
  color:#ffffff;
  font-weight:600;
}