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

body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 450px;
}

.auth-box {
    background-color: #1a1a1a;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 2px solid #2a2a2a;
}

.auth-header {
    text-align: center;
    margin-bottom: 35px;
}

.auth-header h1 {
    font-size: 48px;
    color: #1db954;
    margin-bottom: 10px;
    font-weight: 700;
}

.auth-header h2 {
    font-size: 28px;
    color: #fff;
    margin-bottom: 8px;
    font-weight: 600;
}

.auth-header p {
    color: #888;
    font-size: 15px;
}

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 25px;
    font-size: 14px;
    line-height: 1.5;
}

.alert-success {
    background-color: rgba(29, 185, 84, 0.15);
    border: 1px solid #1db954;
    color: #1db954;
}

.alert-error {
    background-color: rgba(255, 68, 68, 0.15);
    border: 1px solid #ff4444;
    color: #ff4444;
}

.login-link {
    display: inline-block;
    margin-top: 10px;
    color: #1db954;
    text-decoration: none;
    font-weight: 600;
    transition: opacity 0.3s;
}

.login-link:hover {
    opacity: 0.8;
}

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

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

.form-group label {
    display: block;
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background-color: #0f0f0f;
    border: 2px solid #2a2a2a;
    border-radius: 8px;
    color: #fff;
    font-size: 15px;
    font-family: 'Roboto', sans-serif;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #1db954;
    box-shadow: 0 0 0 3px rgba(29, 185, 84, 0.1);
}

.form-group input::placeholder {
    color: #555;
}

.btn-auth {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #1db954 0%, #17a047 100%);
    color: #000;
    font-size: 16px;
    font-weight: 700;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-auth:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(29, 185, 84, 0.3);
}

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

.auth-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #2a2a2a;
}

.auth-footer p {
    color: #888;
    font-size: 14px;
    margin-bottom: 10px;
}

.auth-footer a {
    color: #1db954;
    text-decoration: none;
    font-weight: 600;
    transition: opacity 0.3s;
}

.auth-footer a:hover {
    opacity: 0.8;
}

/* Responsive */
@media (max-width: 480px) {
    .auth-box {
        padding: 30px 25px;
    }

    .auth-header h1 {
        font-size: 40px;
    }

    .auth-header h2 {
        font-size: 24px;
    }
}