:root {
    --dorado: #d9b36c;
    --blanco: #ffffff;
    --texto-suave: rgba(255, 255, 255, 0.78);
    --azul-btn-1: #3a9bff;
    --azul-btn-2: #1669e0;
    --campo-bg: rgba(255, 255, 255, 0.08);
    --campo-borde: rgba(255, 255, 255, 0.35);
    --campo-foco: #e8f0fe;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
    font-family: 'Nunito', system-ui, sans-serif;
    color: var(--blanco);
    background: #0d1a33;
    overflow-x: hidden;
}

/* ---------- Fondo ----------
   La foto se configura en Administrador › Imagen del Sistema (index.php la inyecta);
   sin foto se ve la fachada de vidrio dibujada con CSS. */
.fondo {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(90deg, rgba(10, 22, 48, 0.92) 0%, rgba(14, 32, 66, 0.70) 45%, rgba(40, 70, 120, 0.35) 100%),
        linear-gradient(160deg, #6f8fc4 0%, #3b5f9a 40%, #1a2f57 100%);
}

.fachada {
    position: absolute;
    inset: 0;
    opacity: 0.55;
    background:
        /* reflejo de nubes */
        radial-gradient(ellipse 30% 18% at 35% 30%, rgba(255, 255, 255, 0.25), transparent 70%),
        radial-gradient(ellipse 25% 14% at 55% 60%, rgba(255, 255, 255, 0.18), transparent 70%),
        /* montantes verticales de aluminio */
        repeating-linear-gradient(90deg, rgba(20, 30, 45, 0.9) 0 3px, transparent 3px 110px),
        /* travesaños horizontales */
        repeating-linear-gradient(0deg, rgba(20, 30, 45, 0.9) 0 3px, transparent 3px 120px),
        /* vidrio */
        linear-gradient(115deg, #1c3566 0%, #2e5596 35%, #4f7cc0 55%, #1f3c72 80%);
    -webkit-mask-image: linear-gradient(90deg, #000 0%, #000 55%, transparent 90%);
            mask-image: linear-gradient(90deg, #000 0%, #000 55%, transparent 90%);
}

/* ---------- Panel de login ---------- */
.login {
    min-height: 100vh;
    width: 100%;
    max-width: 390px;
    margin-left: clamp(16px, 10.5vw, 220px);
    padding: 40px 16px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.marca {
    font-family: 'Exo 2', sans-serif;
    font-weight: 800;
    font-size: 2rem;
    letter-spacing: -0.5px;
    line-height: 1;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}
.marca-acri  { color: var(--dorado); margin-right: 6px; }
.marca-glass { color: var(--blanco); }

.marca-sub {
    margin-top: 4px;
    font-family: 'Exo 2', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--dorado);
}

.bienvenida {
    margin: 26px 0 22px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    line-height: 1.4;
}

form { display: flex; flex-direction: column; gap: 16px; }

.campo { position: relative; }

.campo input {
    width: 100%;
    height: 48px;
    padding: 0 46px 0 16px;
    font: inherit;
    font-size: 0.95rem;
    color: var(--blanco);
    background: var(--campo-bg);
    border: 1px solid var(--campo-borde);
    border-radius: 10px;
    outline: none;
    backdrop-filter: blur(4px);
    transition: background .2s, border-color .2s, box-shadow .2s;
}
.campo input::placeholder { color: rgba(255, 255, 255, 0.6); }

.campo input:focus {
    background: var(--campo-foco);
    color: #1b2a44;
    border-color: #5b9cff;
    box-shadow: 0 0 0 3px rgba(58, 155, 255, 0.35);
}
.campo input:focus::placeholder { color: #7a879c; }

.icono {
    position: absolute;
    right: 16px;
    top: 50%;
    width: 18px;
    height: 18px;
    transform: translateY(-50%);
    fill: #7b5cc4;
    pointer-events: none;
}
.icono.candado { fill: #e0a526; }

.recordar {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    cursor: pointer;
    padding-left: 4px;
}
.recordar input { width: 16px; height: 16px; accent-color: #1f78ff; }

.btn-login {
    height: 46px;
    margin-top: 4px;
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--blanco);
    border: none;
    border-radius: 24px;
    cursor: pointer;
    background: linear-gradient(180deg, var(--azul-btn-1), var(--azul-btn-2));
    box-shadow: 0 6px 18px rgba(22, 105, 224, 0.45);
    transition: transform .15s, box-shadow .15s, filter .15s;
}
.btn-login:hover  { filter: brightness(1.08); box-shadow: 0 8px 22px rgba(22, 105, 224, 0.6); }
.btn-login:active { transform: translateY(1px); }

.olvido {
    display: block;
    margin: 22px 0 30px;
    text-align: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--blanco);
    text-decoration: none;
}
.olvido:hover { text-decoration: underline; }

.legal {
    text-align: center;
    font-size: 0.75rem;
    color: var(--texto-suave);
}
.version {
    margin-top: 8px;
    text-align: center;
    font-size: 0.7rem;
    color: #8fb3ff;
}

@media (max-width: 600px) {
    .login { margin: 0 auto; }
    .fondo {
        background:
            linear-gradient(rgba(10, 22, 48, 0.85), rgba(10, 22, 48, 0.85)),
            linear-gradient(160deg, #3b5f9a, #1a2f57);
    }
}

/* Mensaje de error del inicio de sesión */
.error-login {
    margin: 0 0 14px;
    padding: 9px 12px;
    border-radius: 8px;
    background: rgba(239, 68, 68, .18);
    border: 1px solid rgba(248, 113, 113, .6);
    color: #fecaca;
    font-size: 13px;
    font-weight: 600;
}