:root {
  --bg: #0a1f1a;
  --bg-2: #0f2e24;
  --fg: #e5ffe5;
  --muted: #9cad9c;
  --primary: #00e676;
  --accent: #69f0ae;
  --danger: #ff5252;
  --ok: #00c853;
  --card: #0f2e24;
  --card-2: #0a1f1a;
  --border: #1f392f;
  --glow: 0 0 30px rgba(0,230,118,.35);
}

[data-theme="light"] {
  --bg: #f1f8e9;
  --bg-2: #dcedc8;
  --fg: #1b2e1b;
  --muted: #5a6b5a;
  --primary: #00c853;
  --accent: #69f0ae;
  --danger: #d93b56;
  --ok: #2e7d32;
  --card: #ffffff;
  --card-2: #f1f8e9;
  --border: #c5e1a5;
  --glow: 0 0 26px rgba(0,200,83,.25);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, "Segoe UI", Roboto, Helvetica, Arial;
  background: radial-gradient(80% 60% at 70% 30%, var(--bg-2), var(--bg));
  color: var(--fg);
  overflow: hidden;
}

/* Canvas de fondo */
#bg { position: fixed; inset: 0; z-index: 0; }

/* Layout */
.wrap {
  position: relative; z-index: 1;
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 48px 16px;
}

/* Marca */
.brand { text-align: center; margin-bottom: 18px; position: relative; }
.logo-glow {
  width: 84px; height: 84px; margin: 0 auto 10px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: var(--glow);
  filter: blur(0.2px);
}
/* Imagen del logo en lugar del div brillante */
.logo-img {
  display: block;
  max-width: min(80%, 200px);
  height: auto;
  margin: 0 auto 10px;
  border-radius: 18px;
  box-shadow: var(--glow);
}

.title { margin: 0; font-size: 1.6rem; letter-spacing: .4px; }
.subtitle { margin: 6px 0 0; color: var(--muted); }

/* Tarjeta */
.card {
  position: relative;
  width: min(520px, 92vw);
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px 22px 24px;
  box-shadow: 0 8px 40px rgba(0,0,0,.25);
  overflow: hidden;
  backdrop-filter: blur(4px);
}
.card__shine {
  position: absolute; inset: -1px;
  background: radial-gradient(800px 400px at -10% -20%, rgba(0,230,118,.08), transparent 60%),
              radial-gradient(800px 400px at 120% 120%, rgba(105,240,174,.08), transparent 60%);
  pointer-events: none;
}

/* Campos */
.field { margin-bottom: 18px; }
label { display:block; margin: 0 0 6px; color: var(--muted); font-size: .95rem; }
.input-wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
}
input[type="text"], input[type="password"] {
  border: 0; outline: none; background: transparent; color: var(--fg);
  padding: 6px 2px; font-size: 1rem;
}
input::placeholder { color: color-mix(in oklab, var(--muted) 70%, transparent); }

.fx { position: absolute; right: 44px; width: 18px; height: 18px; opacity: .25; }
.fx-user {
  top: 14px;
  background:
    radial-gradient(circle at 45% 35%, var(--fg) 35%, transparent 36%),
    radial-gradient(circle at 55% 35%, var(--fg) 35%, transparent 36%),
    radial-gradient(20px 14px at 50% 78%, var(--fg) 40%, transparent 41%);
}
.fx-lock {
  top: 12px; right: 14px;
  background: linear-gradient(var(--fg), var(--fg));
  -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="%23000" d="M12 1a6 6 0 00-6 6v3H5a2 2 0 00-2 2v9a2 2 0 002 2h14a2 2 0 002-2v-9a2 2 0 00-2-2h-1V7a6 6 0 00-6-6zm-4 9V7a4 4 0 118 0v3H8z"/></svg>') center/contain no-repeat;
  mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="%23000" d="M12 1a6 6 0 00-6 6v3H5a2 2 0 00-2 2v9a2 2 0 002 2h14a2 2 0 002-2v-9a2 2 0 00-2-2h-1V7a6 6 0 00-6-6zm-4 9V7a4 4 0 118 0v3H8z"/></svg>') center/contain no-repeat;
}

.toggle {
  appearance: none; border: 0; background: transparent; color: var(--muted);
  font-size: 18px; cursor: pointer; padding: 6px 8px; border-radius: 10px;
}
.toggle.active { color: var(--primary); }

/* Botón */
.btn {
  position: relative; display: inline-grid; place-items:center;
  width: 100%; height: 46px;
  border-radius: 12px; border: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in oklab, var(--primary) 24%, transparent), transparent);
  color: var(--fg); font-weight: 600; letter-spacing: .2px; cursor: pointer;
  transition: transform .16s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--glow); border-color: color-mix(in oklab, var(--primary) 40%, var(--border)); }
.btn__text { position: relative; z-index: 1; }
.btn__loader {
  position: absolute; inset: 0; display: grid; place-items: center;
  opacity: 0; pointer-events: none; transition: opacity .2s ease;
}
.btn__loader.show { opacity: 1; }
.btn__loader::after {
  content:""; width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid color-mix(in oklab, var(--fg) 35%, transparent);
  border-top-color: var(--fg); animation: spin 1s linear infinite;
}
.btn__glow { position:absolute; inset: -1px; border-radius: inherit; pointer-events:none; box-shadow: var(--glow); opacity:.0; transition: .2s; }
.btn:hover .btn__glow { opacity: .6; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Estado del formulario */
.form-status { margin-top: 10px; min-height: 18px; color: var(--muted); font-size: .92rem; }
.shake { animation: shake .45s ease; }
@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}

/* Flash */
.flash { list-style: none; padding: 0; margin: 0 0 14px; }
.flash__item {
  margin: 8px 0 0; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--border); background: rgba(255,255,255,.03);
}
.flash__item.success { border-color: color-mix(in oklab, var(--ok) 50%, var(--border)); }
.flash__item.info    { border-color: color-mix(in oklab, var(--primary) 50%, var(--border)); }
.flash__item.warning { border-color: color-mix(in oklab, var(--accent) 45%, var(--border)); }
.flash__item.danger  { border-color: color-mix(in oklab, var(--danger) 55%, var(--border)); }

/* Footer */
.foot {
  margin-top: 16px; text-align: center; color: var(--muted);
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.tiny-link {
  appearance: none; border: 0; background: transparent; color: var(--primary);
  cursor: pointer; font: inherit; padding: 4px 6px; border-radius: 8px;
}
.tiny-link:hover { text-decoration: underline; }
.foot__sep { opacity: .35; }

/* Responsive */
@media (max-width: 520px) {
  .title { font-size: 1.35rem; }
  .card { padding: 20px 16px; }
}