:root {
    --primary: #f8fc04;
    --dark: #141414;
    --light: #ffffff;
    --error: #ff4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: var(--dark);
    color: var(--light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.login-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-header h1 {
    color: var(--primary);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--light);
}

.form-group input {
    width: 100%;
    padding: 0.8rem;
    padding-left: 2.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    color: var(--light);
    transition: all 0.3s ease;
}

.form-group i {
    position: absolute;
    left: 1rem;
    top: 2.3rem;
    color: var(--primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.15);
}

.form-group .error-message {
    color: var(--error);
    font-size: 0.8rem;
    margin-top: 0.3rem;
    display: none;
}

.form-group.error input {
    border-color: var(--error);
}

.form-group.error .error-message {
    display: block;
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: var(--primary);
    border: none;
    border-radius: 4px;
    color: var(--dark);
    font-weight: bold;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.submit-btn:hover {
    opacity: 0.9;
}

.register-link {
    text-align: center;
    margin-top: 1rem;
}

.register-link a {
    color: var(--primary);
    text-decoration: none;
}

.register-link a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .login-container {
        margin: 1rem;
        padding: 1.5rem;
    }
}