/*
 * Archivo: wwwroot/css/login.css
 * Descripción: Página de login "CELEX" — mismo lenguaje visual que la pantalla
 * de carga (loading-screen.css: reutiliza variables --ls-* y clases ls-bg/ls-orb/
 * ls-grid/ls-wordmark). Tema claro/oscuro vía data-bs-theme y responsive.
 */

/* ========================================
   Variables por tema (complementan --ls-*)
   ======================================== */
:root {
    --lx-card-bg: rgba(255, 255, 255, 0.72);
    --lx-card-border: rgba(15, 23, 42, 0.08);
    --lx-card-shadow: 0 30px 70px -30px rgba(15, 23, 42, 0.35);
    --lx-input-bg: rgba(15, 23, 42, 0.04);
    --lx-input-border: rgba(15, 23, 42, 0.12);
    --lx-input-color: #0f172a;
    --lx-error: #dc2626;
}

[data-bs-theme="dark"] {
    --lx-card-bg: rgba(13, 18, 31, 0.62);
    --lx-card-border: rgba(148, 163, 184, 0.14);
    --lx-card-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.85);
    --lx-input-bg: rgba(148, 163, 184, 0.07);
    --lx-input-border: rgba(148, 163, 184, 0.18);
    --lx-input-color: #e2e8f0;
    --lx-error: #f87171;
}

/* ========================================
   Pantalla
   ======================================== */
.login-screen {
    position: fixed;
    inset: 0;
    display: flex;
    padding: 16px;
    background: var(--ls-bg);
    /* Permite desplazarse si la tarjeta no entra (validación en pantallas chicas) */
    overflow-y: auto;
    overflow-x: hidden;
    transition: background 0.3s ease;
}

/* El ambiente no acompaña el scroll interno */
.login-screen .ls-bg {
    position: fixed;
    inset: 0;
}

/* ========================================
   Toggle de tema (sol / luna)
   ======================================== */
.lx-theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 5;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--lx-input-border);
    background: var(--lx-card-bg);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    color: var(--ls-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    cursor: pointer;
    transition: color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.lx-theme-toggle:hover {
    color: var(--ls-accent-2);
    border-color: var(--ls-accent-2);
    box-shadow: 0 0 16px -4px var(--ls-glow);
    transform: rotate(12deg);
}

.lx-theme-toggle:active {
    transform: scale(0.92);
}

/* ========================================
   Tarjeta (glassmorphism)
   ======================================== */
.lx-card {
    position: relative;
    /* margin:auto centra y evita recortes cuando hay scroll */
    margin: auto;
    width: min(430px, 100%);
    padding: clamp(28px, 6vw, 46px) clamp(22px, 5vw, 42px);
    border-radius: 22px;
    background: var(--lx-card-bg);
    border: 1px solid var(--lx-card-border);
    -webkit-backdrop-filter: blur(22px);
    backdrop-filter: blur(22px);
    box-shadow: var(--lx-card-shadow);
    opacity: 0;
    animation: lx-card-in 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}

/* Línea de acento superior */
.lx-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 12%;
    right: 12%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--ls-accent-1), var(--ls-accent-2), var(--ls-accent-3), transparent);
    opacity: 0.75;
}

@keyframes lx-card-in {
    from {
        opacity: 0;
        transform: translateY(22px) scale(0.985);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ========================================
   Marca dentro de la tarjeta
   ======================================== */
.lx-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 34px;
}

/* Reduce el wordmark del loader al tamaño de la tarjeta */
.lx-card .ls-wordmark {
    font-size: clamp(2.1rem, 9vw, 2.7rem);
}

.lx-card .ls-tagline {
    margin-top: 6px;
    font-size: 0.62rem;
}

/* ========================================
   Formulario
   ======================================== */
.lx-field {
    margin-bottom: 18px;
}

.lx-card .form-control {
    background: var(--lx-input-bg);
    border: 1px solid var(--lx-input-border);
    color: var(--lx-input-color);
    border-radius: 12px;
    padding: 0.8rem 1rem;
    font-size: 0.95rem;
    box-shadow: none;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.lx-card .form-control::placeholder {
    color: var(--ls-text-muted);
    opacity: 0.85;
}

.lx-card .form-control:focus {
    background: var(--lx-input-bg);
    color: var(--lx-input-color);
    border-color: var(--ls-accent-2);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--ls-accent-2) 18%, transparent), 0 0 18px -8px var(--ls-glow);
}

/* Botón "ojo" del PasswordInput (input-group) */
.lx-card .input-group .btn {
    background: var(--lx-input-bg);
    border: 1px solid var(--lx-input-border);
    border-left: none;
    color: var(--ls-text-muted);
    border-top-right-radius: 12px;
    border-bottom-right-radius: 12px;
    transition: color 0.25s ease;
}

.lx-card .input-group .btn:hover {
    color: var(--ls-accent-2);
}

.lx-card .input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

/* Mensajes de validación */
.lx-card .validation-message {
    display: block;
    margin-top: 6px;
    font-size: 0.78rem;
    color: var(--lx-error);
    letter-spacing: 0.02em;
}

/* ========================================
   Botón de ingreso
   ======================================== */
.lx-card .lx-submit {
    width: 100%;
    margin-top: 6px;
    border: none;
    border-radius: 12px;
    padding: 0.85rem 1rem;
    font-size: 0.98rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: #fff;
    background: linear-gradient(100deg, var(--ls-accent-1), var(--ls-accent-2), var(--ls-accent-3));
    background-size: 180% 100%;
    background-position: 0% 0;
    box-shadow: 0 12px 28px -14px var(--ls-glow);
    transition: background-position 0.45s ease, transform 0.2s ease, box-shadow 0.3s ease;
}

.lx-card .lx-submit:hover:not(:disabled),
.lx-card .lx-submit:focus-visible {
    color: #fff;
    background-position: 95% 0;
    transform: translateY(-1px);
    box-shadow: 0 16px 34px -14px var(--ls-glow);
}

.lx-card .lx-submit:active:not(:disabled) {
    transform: translateY(0);
}

.lx-card .lx-submit:disabled {
    color: #fff;
    opacity: 0.75;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 480px) {
    .lx-theme-toggle {
        top: 14px;
        right: 14px;
    }

    .lx-brand {
        margin-bottom: 26px;
    }
}

@media (max-height: 560px) {
    .lx-brand {
        margin-bottom: 20px;
    }

    .lx-card {
        padding-top: 24px;
        padding-bottom: 24px;
    }
}

/* ========================================
   Accesibilidad: movimiento reducido
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    .lx-card {
        animation: lx-card-in 0.01s forwards;
    }
}