/* ===== Spark Studio — Closed login/register gate ===== */
:root {
  --bg-0: #0a0b10;
  --bg-1: #11131c;
  --bg-2: #171a26;
  --line: #262b3a;
  --txt: #e8ebf5;
  --muted: #9aa3bd;
  --accent: #6c8cff;
  --accent-2: #9a6cff;
  --danger: #ff6b6b;
  --ok: #43d39e;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

#root { display: none; } /* oculto hasta autenticar */

#gate {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(108,140,255,0.18), transparent 60%),
    radial-gradient(1000px 500px at 110% 120%, rgba(154,108,255,0.16), transparent 55%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1) 60%, var(--bg-2));
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--txt);
}

.gate-card {
  width: 100%;
  max-width: 410px;
  background: rgba(20,23,34,0.86);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 34px 30px 30px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.55);
  backdrop-filter: blur(8px);
}

.gate-brand {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: flex;
  align-items: center;
  gap: 10px;
}
.gate-brand .spark { -webkit-text-fill-color: initial; color: var(--accent); }

.gate-sub {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13.5px;
}

.gate-tabs {
  display: flex;
  gap: 6px;
  margin: 22px 0 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 5px;
}
.gate-tabs button {
  flex: 1;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  padding: 10px 8px;
  border-radius: 9px;
  cursor: pointer;
  transition: all .15s ease;
}
.gate-tabs button.active {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 6px 18px rgba(108,140,255,0.35);
}

.gate-form { display: flex; flex-direction: column; gap: 12px; }
.gate-form.hidden { display: none; }

.gate-form input {
  width: 100%;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 13px 14px;
  color: var(--txt);
  font: inherit;
  font-size: 14.5px;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.gate-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108,140,255,0.18);
}
.gate-form input::placeholder { color: #606a85; }

.gate-form button[type="submit"] {
  margin-top: 4px;
  border: 0;
  border-radius: 11px;
  padding: 13px;
  font: inherit;
  font-weight: 700;
  font-size: 15px;
  color: #fff;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  cursor: pointer;
  transition: transform .12s ease, opacity .12s ease;
}
.gate-form button[type="submit"]:hover { transform: translateY(-1px); }
.gate-form button[type="submit"]:disabled { opacity: .6; cursor: progress; }

/* Registro cerrado: el formulario queda claramente deshabilitado y atenuado */
.gate-form.closed input,
.gate-form.closed button[type="submit"] {
  opacity: .45;
  cursor: not-allowed;
  filter: grayscale(0.4);
}

.gate-msg {
  min-height: 18px;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}
.gate-msg.err { color: var(--danger); }
.gate-msg.ok { color: var(--ok); }

.gate-foot {
  margin-top: 18px;
  text-align: center;
  font-size: 12px;
  color: #5b6480;
}