:root {
    --barber-black: #0a0a0a;
    --barber-gold: #d4af37;
    --barber-dark-gold: #aa8a2e;
    --accent-glow: rgba(212, 175, 55, 0.2);
}

body,
html {
    height: 100%;
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background-color: var(--barber-black);
    color: #fff;
    overflow: hidden;
}

/* --- ESTILOS DEL PRELOADER (PANTALLA DE CARGA) --- */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, #1a1a1a 0%, #000000 100%);
    display: none;
    z-index: 9999;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 5px solid #1a1a1a;
    border-top: 5px solid var(--barber-gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.dev-branding {
    position: absolute;
    bottom: 40px;
    text-align: center;
    animation: fadeIn 1.5s ease-in;
}

.dev-logo {
    width: 50px;
    margin-bottom: 10px;
    filter: drop-shadow(0 2px 4px rgba(212, 175, 55, 0.3));
}

.dev-web {
    color: var(--barber-gold);
    font-family: 'Montserrat';
    font-size: 0.75rem;
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- LAYOUT PRINCIPAL --- */
.main-wrapper {
    display: flex;
    height: 100vh;
    transition: filter 0.5s ease;
}

/* Lado Izquierdo: Branding */
.brand-section {
    background: radial-gradient(circle at center, #1a1a1a 0%, var(--barber-black) 100%);
    width: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 60px;
    position: relative;
    border-right: 2px solid var(--barber-gold);
    overflow: hidden;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.4;
    z-index: 1;
}

.brand-section h2 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 2.8rem;
    text-align: center;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 2px;
    z-index: 2;
    position: relative;
    text-shadow: 0 0 20px var(--accent-glow);
    border-top: 4px solid var(--barber-gold);
    padding-top: 20px;
}

.typewriter-text {
    font-family: 'Montserrat', sans-serif;
    font-weight: 500;
    color: var(--barber-gold);
    overflow: hidden;
    border-right: .15em solid var(--barber-gold);
    white-space: nowrap;
    margin: 20px auto 0;
    letter-spacing: .15em;
    animation: typing 3.5s steps(40, end), blink-caret .75s step-end infinite;
    z-index: 2;
    position: relative;
}

@keyframes typing {
    from { width: 0 }
    to { width: 100% }
}

@keyframes blink-caret {
    from,
    to { border-color: transparent }
    50% { border-color: var(--barber-gold); }
}

/* Lado Derecho: Acceso */
.login-section {
    width: 50%;
    background-color: #0f0f0f;
    background-image: linear-gradient(rgba(10, 10, 10, 0.4), rgba(10, 10, 10, 0.9)),
        url('../../img/stylish-barber-shop-logo-featuring-260nw.png');
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: rgba(20, 20, 20, 0.7);
    padding: 40px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(212, 175, 55, 0.1);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
}

.logo-img-main {
    width: 200px;
    display: block;
    margin: 0 auto 40px;
    filter: drop-shadow(0 0 10px var(--accent-glow));
}

.form-label {
    font-weight: 500;
    color: var(--barber-gold);
    font-size: 0.85rem;
    text-transform: uppercase;
}

.form-control {
    background-color: rgba(30, 30, 30, 0.8);
    border: 1px solid #333;
    color: #fff;
    padding: 12px;
}

.form-control:focus {
    box-shadow: 0 0 10px var(--accent-glow);
    border-color: var(--barber-gold);
    background-color: #1a1a1a;
    color: #fff;
}

.input-group-text {
    background-color: #1a1a1a;
    border-color: #333;
    color: var(--barber-gold);
}

.btn-login {
    background: linear-gradient(135deg, var(--barber-gold) 0%, var(--barber-dark-gold) 100%);
    border: none;
    color: #000;
    padding: 15px;
    font-weight: 800;
    text-transform: uppercase;
    transition: all 0.3s ease;
    letter-spacing: 1px;
    border-bottom: 4px solid #8a6d20;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(212, 175, 55, 0.4);
    background-color: var(--barber-gold);
    color: #000;
}

.divider {
    height: 2px;
    margin: 30px 0;
    border-radius: 2px;
    background: linear-gradient(to right, transparent, var(--barber-gold), transparent);
}

.toggle-link {
    color: var(--barber-gold);
    cursor: pointer;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: bold;
}

.toggle-link:hover {
    text-decoration: underline;
    color: #fff;
}

@media (max-width: 992px) {
    .brand-section {
        display: none;
    }
    .login-section {
        width: 100%;
    }
}

/* --- ALERTAS PERSONALIZADAS STARK --- */
.stark-alert-container {
    margin-bottom: 20px;
}

.alert-stark {
    background: #111 !important;
    border-radius: 8px !important;
    border: 1px solid #333 !important;
    font-size: 0.8rem !important;
    font-weight: 500;
    padding: 12px !important;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.alert-stark i {
    font-size: 1.1rem;
}

.alert-stark-success {
    border-left: 4px solid #198754 !important;
    color: #2ecc71 !important;
}

.alert-stark-warning {
    border-left: 4px solid #f1c40f !important;
    color: #f1c40f !important;
}

.alert-stark-danger {
    border-left: 4px solid #e74c3c !important;
    color: #e74c3c !important;
}

.animate__animated {
    animation-duration: 0.5s;
    animation-fill-mode: both;
}

.animate__fadeIn {
    animation-name: fadeIn;
}

/* --- ESTILOS MEDIDOR DE FUERZA DE CONTRASEÑA --- */
.password-strength-wrapper {
    text-align: left;
}

.progress {
    border-radius: 10px;
    overflow: hidden;
    background-color: #1a1a1a !important; /* Fondo oscuro para la barra */
}

.progress-bar {
    transition: width 0.4s ease, background-color 0.4s ease;
}

/* Colores Stark para la fuerza */
.bg-stark-weak { background-color: #ff4d4d !important; }    /* Rojo */
.bg-stark-medium { background-color: #ffd11a !important; }  /* Amarillo Dorado */
.bg-stark-strong { background-color: #2ecc71 !important; }  /* Esmeralda */