/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background-color: #050810;
    background-image: radial-gradient(circle at top left, #111827 0%, #050810 55%, #020309 100%);
    background-attachment: fixed;
    color: #f5f7ff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1rem;
}

/* Contenedor principal */
.login-container {
    width: 100%;
    max-width: 420px;
}

/* Card del login */
.login-card {
    background: linear-gradient(180deg, #001428 0%, #00273C 100%);
    border-radius: 18px;
    padding: 2.5rem 2rem;
    box-shadow: 
        0 18px 45px rgba(0, 0, 0, 0.65),
        0 0 0 1px rgba(14, 165, 233, 0.18);
    text-align: center;
}

/* Logo */
.logo {
    margin: 0 auto 1rem;
    display: inline-block;
}

.logo img {
    width: 120px;
    height: 120px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(14, 165, 233, 0.3);
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

/* Título */
.login-card h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #f5f7ff;
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.subtitle {
    font-size: 0.95rem;
    color: #38bdf8;
    margin-bottom: 2rem;
}

/* Form groups */
.form-group {
    margin-bottom: 1.2rem;
    text-align: left;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: #cbd5f5;
    font-weight: 500;
    margin-bottom: 0.4rem;
}

.form-group input {
    width: 100%;
    background: #0f172a;
    border-radius: 10px;
    border: 1px solid rgba(55, 65, 81, 0.9);
    padding: 0.7rem;
    color: #e5e7f5;
    font-size: 0.9rem;
    outline: none;
    transition: all 0.18s ease;
}

.form-group input:focus {
    border-color: #38bdf8;
    box-shadow: 
        0 0 0 1px rgba(14, 165, 233, 0.8),
        0 0 0 6px rgba(14, 165, 233, 0.25);
    background: #020617;
}

.form-group small {
    display: block;
    font-size: 0.75rem;
    color: #9ca3c7;
    margin-top: 0.3rem;
}

.form-group small a {
    color: #38bdf8;
    text-decoration: none;
}

.form-group small a:hover {
    text-decoration: underline;
    color: #0ea5e9;
}

/* Mensaje de error */
.error-message {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.5);
    color: #fca5a5;
    padding: 0.7rem;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

/* Botón login */
.btn-login {
    width: 100%;
    border: none;
    border-radius: 999px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    color: #fdf4ff;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    box-shadow: 
        0 14px 30px rgba(30, 58, 138, 0.4),
        0 0 0 1px rgba(248, 250, 252, 0.05);
    transition: all 0.12s ease;
    margin-top: 1.5rem;
}

.btn-login:hover:not(:disabled) {
    transform: translateY(-1px);
    filter: brightness(1.15);
    box-shadow: 
        0 18px 40px rgba(30, 58, 138, 0.5),
        0 0 0 1px rgba(248, 250, 252, 0.08);
}

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 480px) {
    body {
        padding: 1rem 0.75rem;
    }
    
    .login-container {
        max-width: 100%;
    }
    
    .login-card {
        padding: 2rem 1.5rem;
    }
    
    .logo img {
        width: 100px;
        height: 100px;
    }
    
    .login-card h1 {
        font-size: 1.6rem;
    }
    
    .subtitle {
        font-size: 0.88rem;
    }
    
    .form-group input {
        padding: 0.65rem;
        font-size: 0.88rem;
    }
    
    .btn-login {
        padding: 0.7rem 1rem;
        font-size: 0.92rem;
    }
}

@media (max-width: 360px) {
    .login-card {
        padding: 1.8rem 1.2rem;
    }
    
    .logo img {
        width: 90px;
        height: 90px;
    }
    
    .login-card h1 {
        font-size: 1.4rem;
    }
    
    .subtitle {
        font-size: 0.85rem;
        margin-bottom: 1.5rem;
    }
}


/* Checkbox "Recordarme" */
.form-group-checkbox {
    margin-bottom: 1rem;
    text-align: left;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    color: #cbd5f5;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #38bdf8;
}

.checkbox-label span {
    transition: color 0.2s ease;
}

.checkbox-label:hover span {
    color: #38bdf8;
}