:root {
    /* Cores BRCentral */
    --primary-purple: #2D1B69;
    --primary-yellow: #FFC107;
    --secondary-purple: #4A2B99;
    --light-purple: #6B46C1;
    --dark-bg: #1a1a2e;
    --darker-bg: #0f0f1e;
    
    /* Cores neutras */
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-600: #6c757d;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    /* Cores de status */
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.25);
    
    /* Transições */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 50%, var(--primary-purple) 100%);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Partículas animadas */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: var(--primary-yellow);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 20s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
    }
    25% {
        transform: translateY(-30px) translateX(20px);
    }
    50% {
        transform: translateY(-60px) translateX(-20px);
    }
    75% {
        transform: translateY(-30px) translateX(20px);
    }
}

/* Container principal */
.login-container {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* Lado esquerdo - Branding */
.login-branding {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    color: var(--white);
    position: relative;
}

.logo-container {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInDown 1s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-circle {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 30px;
}

.logo-ring {
    position: absolute;
    border-radius: 50%;
    animation: rotate 10s linear infinite;
}

.logo-ring.yellow {
    width: 200px;
    height: 200px;
    border: 20px solid var(--primary-yellow);
    border-top-color: transparent;
    border-left-color: transparent;
    top: 0;
    left: 0;
}

.logo-ring.purple {
    width: 140px;
    height: 140px;
    border: 15px solid var(--primary-purple);
    border-bottom-color: transparent;
    border-right-color: transparent;
    top: 30px;
    left: 30px;
    animation-direction: reverse;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.brand-name {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-purple);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    margin: 0;
    letter-spacing: -2px;
}

.brand-tagline {
    font-size: 1.8rem;
    color: var(--primary-yellow);
    font-weight: 300;
    margin-top: -10px;
    letter-spacing: 8px;
}

.branding-text {
    text-align: center;
    animation: fadeInUp 1s ease 0.3s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.branding-text h2 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--white);
}

.branding-text p {
    font-size: 1.2rem;
    color: var(--gray-300);
    font-style: italic;
}

/* Lado direito - Formulário */
.login-form-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.login-card {
    background: var(--white);
    border-radius: 20px;
    padding: 50px 40px;
    width: 100%;
    max-width: 450px;
    box-shadow: var(--shadow-xl);
    animation: slideInRight 0.8s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header h2 {
    font-size: 2rem;
    color: var(--primary-purple);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--gray-600);
    font-size: 0.95rem;
}

/* Alertas */
#alert-container {
    margin-bottom: 20px;
}

.alert {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideInDown 0.3s ease;
    font-size: 0.9rem;
}

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

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid var(--success);
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid var(--danger);
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-left: 4px solid var(--info);
}

/* Formulário */
.login-form {
    width: 100%;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--gray-800);
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group label i {
    margin-right: 8px;
    color: var(--primary-purple);
}

.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--gray-300);
    border-radius: 10px;
    font-size: 1rem;
    transition: all var(--transition-normal);
    background: var(--gray-100);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-purple);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(45, 27, 105, 0.1);
}

.password-input {
    position: relative;
}

.password-input input {
    padding-right: 50px;
}

.toggle-password {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray-600);
    cursor: pointer;
    padding: 5px;
    transition: color var(--transition-fast);
}

.toggle-password:hover {
    color: var(--primary-purple);
}

/* Opções do formulário */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    font-size: 0.9rem;
}

.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--gray-700);
    user-select: none;
}

.checkbox-container input {
    margin-right: 8px;
    cursor: pointer;
}

.forgot-password {
    color: var(--primary-purple);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.forgot-password:hover {
    color: var(--secondary-purple);
    text-decoration: underline;
}

/* Botão de login */
.btn-login {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--secondary-purple) 100%);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.btn-login:hover::before {
    left: 100%;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(45, 27, 105, 0.3);
}

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

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Footer do login */
.login-footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-300);
}

.login-footer p {
    color: var(--gray-600);
    font-size: 0.85rem;
}

.login-footer i {
    color: var(--success);
    margin-right: 5px;
}

/* Informação de versão */
.version-info {
    margin-top: 20px;
    text-align: center;
}

.version-info p {
    color: var(--gray-300);
    font-size: 0.8rem;
}

/* Responsivo */
@media (max-width: 1024px) {
    .login-container {
        flex-direction: column;
    }
    
    .login-branding {
        padding: 40px 20px;
    }
    
    .logo-circle {
        width: 150px;
        height: 150px;
    }
    
    .logo-ring.yellow {
        width: 150px;
        height: 150px;
        border-width: 15px;
    }
    
    .logo-ring.purple {
        width: 105px;
        height: 105px;
        border-width: 12px;
        top: 22.5px;
        left: 22.5px;
    }
    
    .brand-name {
        font-size: 3rem;
    }
    
    .brand-tagline {
        font-size: 1.4rem;
    }
}

@media (max-width: 768px) {
    .login-card {
        padding: 40px 30px;
    }
    
    .login-header h2 {
        font-size: 1.6rem;
    }
    
    .form-options {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .login-branding,
    .login-form-container {
        padding: 20px;
    }
    
    .login-card {
        padding: 30px 20px;
    }
    
    .brand-name {
        font-size: 2.5rem;
    }
    
    .brand-tagline {
        font-size: 1.2rem;
    }
}