/* ==========================================================================
   ESTILOS PERSONALIZADOS DE AUTENTICACIÓN - "NEW GYMNASTICS"
   Paleta inspirada fielmente en el logotipo institucional (/assets/img/logo.png)
   ========================================================================== */

:root {
    --gym-blue-primary: #093CB5;
    --gym-blue-dark: #071F5E;
    --gym-blue-light: #EBF1FF;
    --gym-blue-hover: #072F91;
    --gym-red-accent: #D92525;
    --gym-red-hover: #BA1A1A;
    --gym-gold: #F59E0B;
    --gym-green: #10B981;
    --gym-dark: #1E293B;
    --gym-bg: #F3F6FC;
    --gym-card-bg: #FFFFFF;
    --gym-border: #E2E8F0;
    --gym-text-muted: #64748B;
    --gym-shadow: 0 20px 45px rgba(9, 60, 181, 0.09), 0 4px 12px rgba(0, 0, 0, 0.04);
}

* {
    box-sizing: border-box;
}

body.login-body {
    min-height: 100vh;
    background-color: var(--gym-bg);
    background-image: 
        radial-gradient(circle at 10% 15%, rgba(9, 60, 181, 0.07) 0%, transparent 40%),
        radial-gradient(circle at 90% 85%, rgba(217, 37, 37, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.03) 0%, transparent 50%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    padding: 1.5rem;
    margin: 0;
}

/* Contenedor Principal */
.login-container {
    width: 100%;
    max-width: 440px;
    margin: auto;
}

/* Tarjeta de Inicio de Sesión */
.login-card {
    background: var(--gym-card-bg);
    border: none;
    border-radius: 1.5rem;
    box-shadow: var(--gym-shadow);
    overflow: hidden;
    position: relative;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

/* Barra superior tricolor inspirada en las estrellas y cinta del logo */
.brand-top-bar {
    height: 6px;
    width: 100%;
    background: linear-gradient(90deg, 
        var(--gym-red-accent) 0%, 
        var(--gym-gold) 35%, 
        var(--gym-blue-primary) 70%, 
        var(--gym-green) 100%
    );
}

/* Cabecera y Logotipo */
.card-header-logo {
    text-align: center;
    padding: 2.25rem 2rem 1.25rem 2rem;
}

.logo-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: 1.25rem;
}

.logo-img {
    width: 130px;
    height: 130px;
    object-fit: contain;
    filter: drop-shadow(0 6px 12px rgba(9, 60, 181, 0.15));
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.04);
}

.brand-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gym-blue-primary);
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
}

.brand-subtitle {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gym-red-accent);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.brand-tagline {
    font-size: 0.82rem;
    color: var(--gym-text-muted);
    margin-bottom: 0;
}

/* Cuerpo del Formulario */
.card-body-form {
    padding: 0 2rem 2.25rem 2rem;
}

/* Form Groups & Inputs */
.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gym-blue-dark);
    margin-bottom: 0.4rem;
}

.input-group-custom {
    position: relative;
    border-radius: 0.85rem;
    background-color: #F8FAFC;
    border: 1.5px solid var(--gym-border);
    display: flex;
    align-items: center;
    transition: all 0.2s ease;
    overflow: hidden;
}

.input-group-custom:focus-within {
    border-color: var(--gym-blue-primary);
    background-color: #FFFFFF;
    box-shadow: 0 0 0 4px rgba(9, 60, 181, 0.12);
}

.input-group-custom .input-icon {
    padding: 0.75rem 0.9rem;
    color: var(--gym-blue-primary);
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.input-group-custom .form-control {
    border: none;
    background: transparent;
    padding: 0.75rem 0.75rem 0.75rem 0;
    font-size: 0.95rem;
    color: var(--gym-dark);
    box-shadow: none;
}

.input-group-custom .form-control:focus {
    outline: none;
    box-shadow: none;
}

.input-group-custom .btn-toggle-password {
    background: transparent;
    border: none;
    color: var(--gym-text-muted);
    padding: 0.75rem 0.9rem;
    cursor: pointer;
    font-size: 1.1rem;
    transition: color 0.2s ease;
}

.input-group-custom .btn-toggle-password:hover {
    color: var(--gym-blue-primary);
}

/* Botón Principal */
.btn-gym-primary {
    background: linear-gradient(135deg, var(--gym-blue-primary) 0%, var(--gym-blue-hover) 100%);
    color: #FFFFFF;
    font-weight: 700;
    font-size: 1rem;
    padding: 0.85rem 1.5rem;
    border: none;
    border-radius: 0.85rem;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    letter-spacing: 0.3px;
    box-shadow: 0 8px 18px rgba(9, 60, 181, 0.28);
    transition: all 0.25s ease;
    cursor: pointer;
}

.btn-gym-primary:hover {
    background: linear-gradient(135deg, var(--gym-blue-hover) 0%, var(--gym-blue-dark) 100%);
    color: #FFFFFF;
    box-shadow: 0 10px 22px rgba(9, 60, 181, 0.38);
    transform: translateY(-1px);
}

.btn-gym-primary:active {
    transform: translateY(0);
}

.btn-gym-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Alertas estilizadas */
.gym-alert {
    border-radius: 0.85rem;
    font-size: 0.88rem;
    padding: 0.8rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin-bottom: 1.25rem;
    border: none;
}

.gym-alert-danger {
    background-color: #FEF2F2;
    color: #991B1B;
    border-left: 4px solid var(--gym-red-accent);
}

.gym-alert-success {
    background-color: #ECFDF5;
    color: #065F46;
    border-left: 4px solid var(--gym-green);
}

.gym-alert-warning {
    background-color: #FFFBEB;
    color: #92400E;
    border-left: 4px solid var(--gym-gold);
}

/* Footer y Notas */
.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--gym-text-muted);
    font-size: 0.8rem;
}

.login-footer a {
    color: var(--gym-blue-primary);
    text-decoration: none;
    font-weight: 600;
}

.login-footer a:hover {
    text-decoration: underline;
}

/* Animaciones sutiles */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card {
    animation: fadeInUp 0.45s ease-out;
}