/* =========================================================================
   Pantalla de acceso. Hoja aparte y mínima: es lo único que ve quien no ha
   entrado, así que no arrastra nada de la aplicación.
   ========================================================================= */

:root {
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI Variable",
          "Segoe UI", system-ui, Roboto, Helvetica, Arial, sans-serif;
  --bg: #eef0f4;
  --surface: #ffffff;
  --fill: rgba(96, 108, 130, .08);
  --border: rgba(18, 24, 38, .09);
  --border-fuerte: rgba(18, 24, 38, .19);
  --text: #111725;
  --text-2: rgba(17, 23, 37, .64);
  --text-3: rgba(17, 23, 37, .63);
  --ink: #0d1117;
  --ink-2: #212936;
  --accent: #7fb2e5;
  --danger: #bd0012;
  --danger-suave: rgba(255, 59, 48, .1);
  --danger-borde: rgba(255, 59, 48, .28);
  --velo-1: rgba(158, 205, 243, .55);
  --velo-2: rgba(196, 208, 240, .4);
  --r: 14px;
  --r-lg: 22px;
  --r-pill: 999px;
  --sombra: 0 2px 5px rgba(20, 30, 55, .04), 0 18px 50px rgba(20, 30, 55, .1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1319;
    --surface: #191e26;
    --fill: rgba(214, 226, 244, .08);
    --border: rgba(214, 226, 244, .12);
    --border-fuerte: rgba(214, 226, 244, .24);
    --text: #eef2f8;
    --text-2: rgba(238, 242, 248, .64);
    --text-3: rgba(238, 242, 248, .6);
    --ink: #eef2f8;
    --ink-2: #dbe1eb;
    --danger: #ff8079;
    --danger-suave: rgba(255, 69, 58, .16);
    --danger-borde: rgba(255, 69, 58, .34);
    --velo-1: rgba(127, 178, 229, .09);
    --velo-2: rgba(127, 178, 229, .05);
    --sombra: 0 2px 5px rgba(0, 0, 0, .4), 0 18px 50px rgba(0, 0, 0, .5);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.fondo {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(140% 44% at 50% -4%, var(--velo-1) 0%, transparent 72%),
    radial-gradient(70% 26% at 96% 2%, var(--velo-2) 0%, transparent 68%);
}

.acceso {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px max(20px, env(safe-area-inset-right)) 40px max(20px, env(safe-area-inset-left));
}

.tarjeta {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border-radius: var(--r-lg);
  box-shadow: var(--sombra);
  padding: 28px 26px 22px;
}

.marca { display: flex; align-items: center; gap: 13px; margin-bottom: 24px; }
.marca .logo {
  width: 44px; height: 44px; border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 3px 12px rgba(20, 30, 55, .2);
  flex-shrink: 0;
}
.marca .logo img { display: block; width: 100%; height: 100%; }
.marca h1 { margin: 0; font-size: 1.1rem; font-weight: 700; letter-spacing: -.02em; }
.marca .sub { margin: 0; font-size: 13px; color: var(--text-2); }

.campo { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.campo label { font-size: 13px; font-weight: 600; color: var(--text-2); }

input[type="text"], input[type="password"] {
  width: 100%;
  min-height: 46px;
  padding: 11px 13px;
  border: 1px solid var(--border-fuerte);
  border-radius: var(--r);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 17px;               /* nunca menos de 16: evita el zoom en iOS */
  -webkit-appearance: none;
  appearance: none;
}
input:focus { outline: 2px solid var(--ink); outline-offset: -2px; }

.campo-clave { position: relative; display: flex; }
.campo-clave input { padding-right: 62px; }
#ver-clave {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  border: none; background: var(--fill); color: var(--text-2);
  font-family: inherit; font-size: 13px; font-weight: 600;
  padding: 7px 11px; border-radius: var(--r-pill); cursor: pointer;
}
#ver-clave:hover { color: var(--text); }

.btn-entrar {
  width: 100%;
  min-height: 52px;
  margin-top: 6px;
  border: none;
  border-radius: var(--r-pill);
  background: var(--ink);
  color: var(--bg);
  font-family: inherit; font-size: 16px; font-weight: 650;
  cursor: pointer;
  transition: opacity .15s, background .15s;
}
@media (prefers-color-scheme: dark) { .btn-entrar { color: #0f1319; } }
.btn-entrar:hover { background: var(--ink-2); }
.btn-entrar:active { opacity: .7; }
.btn-entrar:disabled { opacity: .5; cursor: progress; }

.error {
  margin: 0 0 14px;
  padding: 11px 13px;
  border-radius: var(--r);
  background: var(--danger-suave);
  border: 1px solid var(--danger-borde);
  color: var(--danger);
  font-size: 14px;
}

.pie {
  margin: 20px 0 0;
  font-size: 12.5px;
  color: var(--text-3);
  text-align: center;
  line-height: 1.4;
}

.oculto { display: none !important; }

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