/* Authentication Screen Styles */
#authScreen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.auth-container {
    background: var(--surface);
    border: 3px solid var(--primary);
    border-radius: 15px;
    padding: 40px;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.7);
}

.auth-title {
    text-align: center;
    color: var(--primary);
    font-size: 32px;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.auth-subtitle {
    text-align: center;
    color: #999;
    font-size: 14px;
    margin-bottom: 30px;
}

.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.auth-tab {
    flex: 1;
    padding: 12px;
    background: var(--background);
    border: 2px solid #4a4a4a;
    color: #999;
    cursor: pointer;
    text-align: center;
    border-radius: 8px;
    transition: all 0.2s;
    font-family: inherit;
    font-size: 14px;
}

.auth-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #1a1a1a;
    font-weight: bold;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--primary);
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    background: var(--background);
    border: 2px solid #4a4a4a;
    color: var(--text);
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: var(--primary);
    border: none;
    color: #1a1a1a;
    font-size: 16px;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
}

.submit-btn:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}