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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #2d2d2d 0%, #3d3d3d 50%, #2d2d2d 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Partículas animadas de fundo */
.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #D4AF37;
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-100px) translateX(50px);
        opacity: 0.6;
    }
}

/* Container principal */
.login-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 450px;
    padding: 20px;
    animation: fadeInUp 0.8s ease-out;
}

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

/* Logo container */
.logo-container {
    text-align: center;
    margin-bottom: 40px;
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.logo-container h1 {
    color: #D4AF37;
    font-size: 42px;
    font-weight: 700;
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.5),
                 0 0 40px rgba(212, 175, 55, 0.3),
                 0 4px 8px rgba(0, 0, 0, 0.5);
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.logo-container .subtitle {
    color: #cccccc;
    font-size: 14px;
    letter-spacing: 1px;
    opacity: 0.8;
}

/* Card de login */
.login-card {
    background: rgba(26, 26, 26, 0.95);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5),
                0 0 0 1px rgba(212, 175, 55, 0.2),
                inset 0 0 60px rgba(212, 175, 55, 0.05);
    padding: 0;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 2px solid transparent;
    background-clip: padding-box;
    position: relative;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #D4AF37, #C9A961, #D4AF37);
    background-size: 200% 100%;
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.card-header {
    background: linear-gradient(135deg, #3d3d3d 0%, #4d4d4d 100%);
    color: #D4AF37;
    padding: 25px;
    text-align: center;
    border-bottom: 2px solid rgba(212, 175, 55, 0.2);
}

.card-header h4 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.card-header i {
    font-size: 28px;
    animation: lockPulse 2s infinite ease-in-out;
}

@keyframes lockPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.card-body {
    padding: 30px;
}

/* Mensagens de alerta */
.alert {
    border-radius: 10px;
    border: none;
    padding: 12px 15px;
    margin-bottom: 20px;
    animation: slideDown 0.3s ease-out;
}

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

.alert-danger {
    background: rgba(255, 107, 107, 0.2);
    color: #ff6b6b;
    border-left: 3px solid #ff6b6b;
}

.alert-success {
    background: rgba(76, 175, 80, 0.2);
    color: #4caf50;
    border-left: 3px solid #4caf50;
}

/* Form groups */
.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-label {
    color: #D4AF37;
    font-weight: 600;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    letter-spacing: 0.5px;
}

.form-label i {
    font-size: 18px;
}

.input-wrapper {
    position: relative;
}

.form-control {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(212, 175, 55, 0.3);
    border-radius: 12px;
    color: #ffffff;
    padding: 14px 45px 14px 15px;
    font-size: 15px;
    transition: all 0.3s ease;
    width: 100%;
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.form-control:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: #D4AF37;
    box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.2),
                0 0 20px rgba(212, 175, 55, 0.1);
    outline: none;
    color: #ffffff;
}

.input-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #D4AF37;
    font-size: 20px;
    pointer-events: none;
    transition: all 0.3s ease;
}

.form-control:focus + .input-icon {
    color: #C9A961;
    transform: translateY(-50%) scale(1.2);
}

/* Botão de submit */
.btn-submit {
    width: 100%;
    background: linear-gradient(135deg, #3d3d3d 0%, #4d4d4d 100%);
    border: 2px solid #D4AF37;
    color: #D4AF37;
    font-weight: 700;
    font-size: 16px;
    padding: 14px;
    border-radius: 12px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
}

.btn-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.2), transparent);
    transition: left 0.5s;
}

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

.btn-submit:hover {
    background: linear-gradient(135deg, #4d4d4d 0%, #3d3d3d 100%);
    border-color: #C9A961;
    color: #C9A961;
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.3),
                0 0 40px rgba(212, 175, 55, 0.1);
    transform: translateY(-2px);
}

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

.btn-submit i {
    font-size: 20px;
}

/* Toggle de senha */
.password-toggle {
    position: absolute;
    right: 45px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #D4AF37;
    cursor: pointer;
    font-size: 18px;
    padding: 5px;
    transition: all 0.3s ease;
    z-index: 2;
}

.password-toggle:hover {
    color: #C9A961;
    transform: translateY(-50%) scale(1.2);
}

/* Responsivo */
@media (max-width: 576px) {
    .login-wrapper {
        max-width: 100%;
        padding: 15px;
    }

    .logo-container h1 {
        font-size: 32px;
    }

    .card-body {
        padding: 20px;
    }
}

/* Loading state */
.btn-submit.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-submit.loading i {
    animation: spin 1s linear infinite;
}

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