body {
    height: 100vh;
    display: flex;
    align-items: center;
    background: #1a1d21;
    overflow: hidden;
}

.form-signin {
    width: 100%;
    max-width: 400px;
    padding: 30px;
    margin: auto;
    background: #2b2f33;
    border-radius: 15px;
    box-shadow: 0 15px 25px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease-in-out;
}

.form-signin:hover {
    transform: translateY(-5px);
}

.form-signin h1 {
    color: #ffffff;
    margin-bottom: 30px;
    font-weight: 600;
}

.form-floating {
    margin-bottom: 0;
}

.form-floating > label {
    display: none;
}

.form-control {
    border-radius: 10px;
    border: none;
    background-color: #f8f9fa;
    color: #000000;
    transition: all 0.3s ease;
    height: 50px;
}

.form-control:focus {
    border: none;
    box-shadow: 0 0 0 2px #2196f3;
}

.form-control::placeholder {
    color: #6c757d;
}

.btn-primary {
    background: #2196f3;
    border: none;
    border-radius: 10px;
    padding: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    color: #ffffff;
    height: 50px;
}

.btn-primary:hover {
    transform: scale(1.02);
    background: #1e88e5;
}

.input-container {
    position: relative;
    margin-bottom: 20px;
}

.input-container input {
    padding-left: 45px !important;
    height: 50px;
}

.input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
    z-index: 10;
}

.password-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #6c757d;
    z-index: 10;
    transition: color 0.3s ease;
}

.password-toggle:hover {
    color: #2196f3;
}

.messages {
    margin-bottom: 20px;
}

.alert {
    border-radius: 10px;
    animation: slideIn 0.5s ease-out;
    background-color: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.2);
    color: #ff6b6b;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}