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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-image: url('../images/background_black.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: #fff;
    line-height: 1.6;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

h2 {
    text-align: center;
    margin-bottom: 25px;
    color: #fff;
    font-size: 1.8em;
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
}

input {
    width: 100%;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 5px;
    color: #fff;
    font-size: 16px;
    transition: all 0.3s;
    outline: none;
}

input:focus {
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 8px rgba(52, 152, 219, 0.5);
}

input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.error-message {
    color: #e74c3c;
    font-size: 14px;
    text-align: center;
    margin-bottom: 15px;
    min-height: 20px;
}

.login-btn {
    width: 100%;
    padding: 12px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

.login-btn:hover {
    background: #2980b9;
}

.back-link {
    text-align: center;
    margin-top: 20px;
}

.back-link a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.back-link a:hover {
    color: #3498db;
}

.home-btn {
    position: fixed;
    top: 20px;
    left: 20px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    text-decoration: none;
    font-size: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    z-index: 100;
}

.home-btn:hover {
    background: #fff;
    transform: scale(1.1);
}